When is the last frost in Fort Collins, CO?

In Fort Collins, CO (USDA zone 5b), the typical last spring frost is around May 3, 2026 and the first fall frost around Oct 6, 2026.

Fort Collins, CO planting calendar

When to plant vegetables in Fort Collins, CO (USDA hardiness zone 5b). Typical last spring frost around May 3, 2026 (±9 days year to year), first fall frost around Oct 6, 2026 (±10 days).

Playing it safe? Spring frost holds off until about May 14, 2026 in roughly 9 years out of 10 — a good target for tender crops like tomatoes and peppers.

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Still time to plant

As of today, these crops can still reach harvest before Fort Collins, CO’s first frost (~Oct 6, 2026) — fastest first.

Month by month in Fort Collins, CO

January

Start seeds indoors: Bunching Onion
Start seeds indoors: Leek
Start seeds indoors: Onion
Start seeds indoors: Shallot

February

Start seeds indoors: Agastache
Start seeds indoors: Alpine Strawberry
Start seeds indoors: Angel Wing Begonia
Start seeds indoors: Artichoke
Start seeds indoors: Arugula
Start seeds indoors: Arugula
Start seeds indoors: Asclepias
Start seeds indoors: Asparagus Fern
Start seeds indoors: Begonia
Start seeds indoors: Bolivian Begonia
Start seeds indoors: Campanula
Start seeds indoors: Canterbury Bells
Start seeds indoors: Celeriac
Start seeds indoors: Celery
Start seeds indoors: Chinese Celery
Start seeds indoors: Chive
Start seeds indoors: Collard
Start seeds indoors: Dracaena
Start seeds indoors: Echinacea
Start seeds indoors: Foxglove
Start seeds indoors: Garlic Chives
Start seeds indoors: Geranium
Start seeds indoors: Hamburg Parsley
Start seeds indoors: Heliotrope
Start seeds indoors: Heuchera
Start seeds indoors: Horehound
Start seeds indoors: Ivy Geranium
Start seeds indoors: Johnny Jump-Up
Start seeds indoors: Kale
Start seeds indoors: Kniphofia
Start seeds indoors: Lavender
Start seeds indoors: Palace Purple Heuchera
Start seeds indoors: Pansy
Start seeds indoors: Parsley
Start seeds indoors: Penstemon
Start seeds indoors: Primula
Start seeds indoors: Rocky Mountain Penstemon
Start seeds indoors: Sage
Start seeds indoors: Siberian Kale
Start seeds indoors: Snapdragon
Start seeds indoors: Sprenger Fern
Start seeds indoors: Stock Flower
Start seeds indoors: Tarragon
Start seeds indoors: Tat Soi
Start seeds indoors: Thyme
Start seeds indoors: Veined Catmint
Start seeds indoors: Veronica
Start seeds indoors: Viola
Start seeds indoors: Wax Begonia

March

Start seeds indoors: Achillea
Start seeds indoors: African Daisy
Start seeds indoors: Ageratum
Start seeds indoors: Aji Pepper
Start seeds indoors: Alternanthera
Start seeds indoors: Alyssum
Start seeds indoors: Angelica
Start seeds indoors: Angelonia
Start seeds indoors: Arabis
Start seeds indoors: Armeria
Start seeds indoors: Arroyo Lupine
Start seeds indoors: Aster
Start seeds indoors: Baby Blue Eyes
Start seeds indoors: Baby's Breath
Start seeds indoors: Bacopa
Start seeds indoors: Balsam
Start seeds indoors: Basket of Gold
Start seeds indoors: Beach Sunflower
Start seeds indoors: Bee Balm
Start seeds indoors: Beet
Start seeds indoors: Bishop's Flower
Start seeds indoors: Blanket Flower
Start seeds indoors: Blue Fescue
Start seeds indoors: Blue Flax
Start seeds indoors: Bok Choy
Start seeds indoors: Brachycome
Start seeds indoors: Broccoli
Start seeds indoors: Broccoli Raab
Start seeds indoors: Brussels Sprouts
Start seeds indoors: Cabbage
Start seeds indoors: Calendula
Start seeds indoors: California Bluebell
Start seeds indoors: Candytuft
Start seeds indoors: Canna
Start seeds indoors: Cape Gooseberry
Start seeds indoors: Cardoon
Start seeds indoors: Carnation
Start seeds indoors: Carrot
Start seeds indoors: Catchfly
Start seeds indoors: Catnip
Start seeds indoors: Cauliflower
Start seeds indoors: Celosia
Start seeds indoors: Celosia (Crested)
Start seeds indoors: Celosia (Plume)
Start seeds indoors: Celtuce / Stem Lettuce
Start seeds indoors: Chicory
Start seeds indoors: Chiltepin Pepper
Start seeds indoors: China Aster
Start seeds indoors: Chinese Broccoli
Start seeds indoors: Chinese Cabbage
Start seeds indoors: Chinese Forget-Me-Not
Start seeds indoors: Chrysanthemum
Start seeds indoors: Chrysanthemum Greens
Start seeds indoors: Clasping Coneflower
Start seeds indoors: Cleome
Start seeds indoors: Coast Rock Cress
Start seeds indoors: Coleus
Start seeds indoors: Columbine
Start seeds indoors: Common Morning Glory
Start seeds indoors: Coreopsis
Start seeds indoors: Corn Poppy
Start seeds indoors: Cottage Pink
Start seeds indoors: Creeping Thyme
Start seeds indoors: Dahlberg Daisy
Start seeds indoors: Dahlia
Start seeds indoors: Dandelion
Start seeds indoors: Delosperma
Start seeds indoors: Delphinium
Start seeds indoors: Dianthus
Start seeds indoors: Dichondra
Start seeds indoors: Dove Pincushion
Start seeds indoors: Dusty Miller
Start seeds indoors: Eggplant
Start seeds indoors: Endive
Start seeds indoors: English Daisy
Start seeds indoors: Ethiopian Eggplant
Start seeds indoors: Ethiopian Kale
Start seeds indoors: European Columbine
Start seeds indoors: Evening Primrose
Start seeds indoors: Flowering Cabbage
Start seeds indoors: Flowering Kale
Start seeds indoors: Flowering Tobacco
Start seeds indoors: Four O Clock
Start seeds indoors: Gaillardia
Start seeds indoors: Gazania
Start seeds indoors: Geum
Start seeds indoors: Globe Gilia
Start seeds indoors: Goldmoss Stonecrop
Start seeds indoors: Gomphrena
Start seeds indoors: Ground Cherry
Start seeds indoors: Hartweg Lupine
Start seeds indoors: Heliopsis
Start seeds indoors: Hibiscus
Start seeds indoors: Hollyhock
Start seeds indoors: Hybrid Columbine
Start seeds indoors: Hybrid Coneflower
Start seeds indoors: Hybrid Lobelia
Start seeds indoors: Hypoestes
Start seeds indoors: Hyssop
Start seeds indoors: Iberis
Start seeds indoors: Iceland Poppy
Start seeds indoors: Impatiens
Start seeds indoors: Interspecific Dianthus
Start seeds indoors: Japanese Mugwort
Start seeds indoors: Kohlrabi
Start seeds indoors: Komatsuna Mustard
Start seeds indoors: Korean Mint
Start seeds indoors: Lace Fern
Start seeds indoors: Lanceleaf Coreopsis
Start seeds indoors: Large-Flowered Evening Primrose
Start seeds indoors: Larkspur
Start seeds indoors: Lavatera
Start seeds indoors: Lemon Balm
Start seeds indoors: Lemon Mint
Start seeds indoors: Lettuce
Start seeds indoors: Liatris
Start seeds indoors: Linaria
Start seeds indoors: Linum
Start seeds indoors: Lobelia
Start seeds indoors: Lovage
Start seeds indoors: Lunaria
Start seeds indoors: Lupine
Start seeds indoors: Malabar Spinach
Start seeds indoors: Malva
Start seeds indoors: Marigold
Start seeds indoors: Marjoram
Start seeds indoors: Maximilian Sunflower
Start seeds indoors: Mexican Hat
Start seeds indoors: Mexican Tarragon
Start seeds indoors: Mexican Zinnia
Start seeds indoors: Mibuna
Start seeds indoors: Milkweed (Common)
Start seeds indoors: Milkweed (Tropical)
Start seeds indoors: Mimosa
Start seeds indoors: Mimulus
Start seeds indoors: Mitsuba
Start seeds indoors: Mizuna
Start seeds indoors: Moonflower
Start seeds indoors: Morning Glory
Start seeds indoors: Myosotis
Start seeds indoors: New England Aster
Start seeds indoors: Nicotiana
Start seeds indoors: Nierembergia
Start seeds indoors: Oregano
Start seeds indoors: Oriental Poppy
Start seeds indoors: Ornamental Millet
Start seeds indoors: Osteospermum
Start seeds indoors: Ox-Eye Daisy
Start seeds indoors: Painted Sage
Start seeds indoors: Paracress
Start seeds indoors: Pennyroyal Mint
Start seeds indoors: Pepper (Habanero)
Start seeds indoors: Pepper (Hot)
Start seeds indoors: Pepper (Sweet & Hot)
Start seeds indoors: Pepper (Tabasco)
Start seeds indoors: Perennial Sweet Pea
Start seeds indoors: Peruvian Verbena
Start seeds indoors: Petunia
Start seeds indoors: Phlox
Start seeds indoors: Plains Coreopsis
Start seeds indoors: Plectranthus
Start seeds indoors: Portulaca
Start seeds indoors: Purple Yu Choy Sum
Start seeds indoors: Radicchio
Start seeds indoors: Ricinus
Start seeds indoors: Rocket Candytuft
Start seeds indoors: Roman Chamomile
Start seeds indoors: Romanesco Broccoli
Start seeds indoors: Roselle
Start seeds indoors: Rudbeckia
Start seeds indoors: Rue
Start seeds indoors: Russian Kale
Start seeds indoors: Russian Sage
Start seeds indoors: Rutabaga
Start seeds indoors: Salad Burnet
Start seeds indoors: Salpiglossis
Start seeds indoors: Salvia
Start seeds indoors: Saponaria
Start seeds indoors: Savory
Start seeds indoors: Scabiosa
Start seeds indoors: Scarlet Flax
Start seeds indoors: Scarlet Sage
Start seeds indoors: Sedum
Start seeds indoors: Shasta Daisy
Start seeds indoors: Sheep Sorrel
Start seeds indoors: Showy Evening Primrose
Start seeds indoors: Signet Marigold
Start seeds indoors: Silver Ponysfoot
Start seeds indoors: Smooth Aster
Start seeds indoors: Soapwort
Start seeds indoors: Statice
Start seeds indoors: Stevia
Start seeds indoors: Stipa
Start seeds indoors: Strawflower
Start seeds indoors: Sundial Lupine
Start seeds indoors: Sweet Pea
Start seeds indoors: Sweet Woodruff
Start seeds indoors: Tansy
Start seeds indoors: Texas Bluebonnet
Start seeds indoors: Texas Sage
Start seeds indoors: Thunbergia
Start seeds indoors: Tomatillo
Start seeds indoors: Tomato
Start seeds indoors: Torenia
Start seeds indoors: Turnip
Start seeds indoors: Verbena
Start seeds indoors: Vietnamese Culantro
Start seeds indoors: Vinca
Start seeds indoors: Water Pepper
Start seeds indoors: Western Coneflower
Start seeds indoors: Wheat Celosia
Start seeds indoors: Woodland Sage
Start seeds indoors: Woodland Tobacco
Start seeds indoors: Wormwood
Start seeds indoors: Yarrow
Start seeds indoors: Yu Choy Sum
Start hardening off: Arugula
Start hardening off: Arugula
Start hardening off: Collard
Start hardening off: Kale
Start hardening off: Siberian Kale
Start hardening off: Tat Soi

April

Start seeds indoors: Amaranth
Start seeds indoors: Amaranthus
Start seeds indoors: Armenian Cucumber
Start seeds indoors: Bachelor's Button
Start seeds indoors: Basil
Start seeds indoors: Billy Buttons
Start seeds indoors: Black Cumin / Nigella
Start seeds indoors: Black-Eyed Susan
Start seeds indoors: Burdock
Start seeds indoors: California Poppy
Start seeds indoors: Chamomile
Start seeds indoors: Chinese Toon
Start seeds indoors: Cosmos
Start seeds indoors: Cucamelon
Start seeds indoors: Cucumber
Start seeds indoors: Epazote
Start seeds indoors: Feverfew
Start seeds indoors: French Marigold
Start seeds indoors: Gourd (Angled Luffa)
Start seeds indoors: Gourd (Bitter)
Start seeds indoors: Gourd (Bottle)
Start seeds indoors: Gourd (Luffa)
Start seeds indoors: Gourd (Ornamental)
Start seeds indoors: Gourd (Turban)
Start seeds indoors: Gourd (Wax)
Start seeds indoors: Grain Amaranth
Start seeds indoors: Gypsophila
Start seeds indoors: Holy Basil
Start seeds indoors: Huauzontle
Start seeds indoors: Korean Summer Squash
Start seeds indoors: Lemon Basil
Start seeds indoors: Lime Basil
Start seeds indoors: Love-in-a-Mist
Start seeds indoors: Love-Lies-Bleeding
Start seeds indoors: Melon
Start seeds indoors: Melon (Pickling)
Start seeds indoors: Mexican Sunflower
Start seeds indoors: Misome
Start seeds indoors: Narrowleaf Zinnia
Start seeds indoors: Nasturtium
Start seeds indoors: Okra
Start seeds indoors: Orach
Start seeds indoors: Phacelia
Start seeds indoors: Poppy
Start seeds indoors: Pumpkin
Start seeds indoors: Pumpkin (Maxima)
Start seeds indoors: Pumpkin (Moschata)
Start seeds indoors: Shiso
Start seeds indoors: Strawberry Spinach
Start seeds indoors: Sulphur Cosmos
Start seeds indoors: Summer Savory
Start seeds indoors: Summer Squash
Start seeds indoors: Sweet Annie
Start seeds indoors: Thai Basil
Start seeds indoors: Watermelon
Start seeds indoors: West Indian Gherkin
Start seeds indoors: Wild Arugula
Start seeds indoors: Winged Bean
Start seeds indoors: Winter Squash (Acorn)
Start seeds indoors: Winter Squash (Banana)
Start seeds indoors: Winter Squash (Buttercup)
Start seeds indoors: Winter Squash (Butternut)
Start seeds indoors: Winter Squash (Cushaw)
Start seeds indoors: Winter Squash (Delicata)
Start seeds indoors: Winter Squash (Hubbard)
Start seeds indoors: Winter Squash (Spaghetti)
Start seeds indoors: Zinnia
Start hardening off: Achillea
Start hardening off: African Daisy
Start hardening off: Agastache
Start hardening off: Alyssum
Start hardening off: Angelica
Start hardening off: Arabis
Start hardening off: Armeria
Start hardening off: Arroyo Lupine
Start hardening off: Artichoke
Start hardening off: Asclepias
Start hardening off: Aster
Start hardening off: Baby Blue Eyes
Start hardening off: Baby's Breath
Start hardening off: Basket of Gold
Start hardening off: Bee Balm
Start hardening off: Beet
Start hardening off: Bishop's Flower
Start hardening off: Blanket Flower
Start hardening off: Blue Fescue
Start hardening off: Blue Flax
Start hardening off: Bok Choy
Start hardening off: Broccoli
Start hardening off: Broccoli Raab
Start hardening off: Brussels Sprouts
Start hardening off: Bunching Onion
Start hardening off: Burdock
Start hardening off: Cabbage
Start hardening off: Calendula
Start hardening off: California Bluebell
Start hardening off: Campanula
Start hardening off: Candytuft
Start hardening off: Canterbury Bells
Start hardening off: Cardoon
Start hardening off: Carrot
Start hardening off: Catchfly
Start hardening off: Catnip
Start hardening off: Cauliflower
Start hardening off: Celeriac
Start hardening off: Celery
Start hardening off: Celosia
Start hardening off: Celosia (Crested)
Start hardening off: Celosia (Plume)
Start hardening off: Celtuce / Stem Lettuce
Start hardening off: Chicory
Start hardening off: China Aster
Start hardening off: Chinese Broccoli
Start hardening off: Chinese Cabbage
Start hardening off: Chinese Celery
Start hardening off: Chinese Forget-Me-Not
Start hardening off: Chive
Start hardening off: Chrysanthemum Greens
Start hardening off: Clasping Coneflower
Start hardening off: Coast Rock Cress
Start hardening off: Columbine
Start hardening off: Coreopsis
Start hardening off: Corn Poppy
Start hardening off: Cottage Pink
Start hardening off: Creeping Thyme
Start hardening off: Dandelion
Start hardening off: Delosperma
Start hardening off: Delphinium
Start hardening off: Echinacea
Start hardening off: Endive
Start hardening off: English Daisy
Start hardening off: Ethiopian Kale
Start hardening off: European Columbine
Start hardening off: Evening Primrose
Start hardening off: Flowering Cabbage
Start hardening off: Flowering Kale
Start hardening off: Foxglove
Start hardening off: Gaillardia
Start hardening off: Garlic Chives
Start hardening off: Geum
Start hardening off: Globe Gilia
Start hardening off: Hamburg Parsley
Start hardening off: Hartweg Lupine
Start hardening off: Heliopsis
Start hardening off: Heuchera
Start hardening off: Hollyhock
Start hardening off: Horehound
Start hardening off: Huauzontle
Start hardening off: Hybrid Columbine
Start hardening off: Hybrid Coneflower
Start hardening off: Hyssop
Start hardening off: Iberis
Start hardening off: Iceland Poppy
Start hardening off: Japanese Mugwort
Start hardening off: Johnny Jump-Up
Start hardening off: Kohlrabi
Start hardening off: Komatsuna Mustard
Start hardening off: Lanceleaf Coreopsis
Start hardening off: Large-Flowered Evening Primrose
Start hardening off: Larkspur
Start hardening off: Lavatera
Start hardening off: Leek
Start hardening off: Lemon Balm
Start hardening off: Lemon Mint
Start hardening off: Lettuce
Start hardening off: Liatris
Start hardening off: Linaria
Start hardening off: Linum
Start hardening off: Lovage
Start hardening off: Lunaria
Start hardening off: Lupine
Start hardening off: Malva
Start hardening off: Mexican Hat
Start hardening off: Mibuna
Start hardening off: Milkweed (Common)
Start hardening off: Milkweed (Tropical)
Start hardening off: Misome
Start hardening off: Mitsuba
Start hardening off: Mizuna
Start hardening off: Myosotis
Start hardening off: Nasturtium
Start hardening off: New England Aster
Start hardening off: Onion
Start hardening off: Orach
Start hardening off: Oregano
Start hardening off: Oriental Poppy
Start hardening off: Ox-Eye Daisy
Start hardening off: Palace Purple Heuchera
Start hardening off: Pansy
Start hardening off: Parsley
Start hardening off: Pennyroyal Mint
Start hardening off: Perennial Sweet Pea
Start hardening off: Phlox
Start hardening off: Plains Coreopsis
Start hardening off: Primula
Start hardening off: Purple Yu Choy Sum
Start hardening off: Radicchio
Start hardening off: Rocket Candytuft
Start hardening off: Roman Chamomile
Start hardening off: Romanesco Broccoli
Start hardening off: Rue
Start hardening off: Russian Kale
Start hardening off: Russian Sage
Start hardening off: Rutabaga
Start hardening off: Sage
Start hardening off: Salad Burnet
Start hardening off: Savory
Start hardening off: Scarlet Flax
Start hardening off: Shallot
Start hardening off: Shasta Daisy
Start hardening off: Sheep Sorrel
Start hardening off: Showy Evening Primrose
Start hardening off: Smooth Aster
Start hardening off: Snapdragon
Start hardening off: Soapwort
Start hardening off: Stock Flower
Start hardening off: Strawberry Spinach
Start hardening off: Strawflower
Start hardening off: Sundial Lupine
Start hardening off: Sweet Pea
Start hardening off: Sweet Woodruff
Start hardening off: Tansy
Start hardening off: Tarragon
Start hardening off: Texas Bluebonnet
Start hardening off: Thyme
Start hardening off: Turnip
Start hardening off: Veined Catmint
Start hardening off: Veronica
Start hardening off: Viola
Start hardening off: Wheat Celosia
Start hardening off: Wormwood
Start hardening off: Yu Choy Sum
Direct sow outdoors: Alfalfa
Direct sow outdoors: Arugula Microgreens
Direct sow outdoors: Asian Greens
Direct sow outdoors: Beet Microgreens
Direct sow outdoors: Black Salsify
Direct sow outdoors: Borage
Direct sow outdoors: Borage Microgreens
Direct sow outdoors: Bronze Fennel
Direct sow outdoors: Cabbage Microgreens
Direct sow outdoors: Caraway
Direct sow outdoors: Catmint
Direct sow outdoors: Chervil
Direct sow outdoors: Chervil Microgreens
Direct sow outdoors: Chrysanthemum Greens Microgreens
Direct sow outdoors: Cilantro
Direct sow outdoors: Cilantro Microgreens
Direct sow outdoors: Corn Salad
Direct sow outdoors: Cress
Direct sow outdoors: Daikon Radish
Direct sow outdoors: Daikon Sprouts
Direct sow outdoors: Dill
Direct sow outdoors: Dill Microgreens
Direct sow outdoors: Fava Bean
Direct sow outdoors: Fennel
Direct sow outdoors: Fennel Microgreens
Direct sow outdoors: Garden Sorrel Microgreens
Direct sow outdoors: Kale Microgreens
Direct sow outdoors: Komatsuna Microgreens
Direct sow outdoors: Leaf Radish
Direct sow outdoors: Leek Microgreens
Direct sow outdoors: Lettuce Crisphead Microgreens
Direct sow outdoors: Lettuce Leaf Microgreens
Direct sow outdoors: Lettuce Microgreens
Direct sow outdoors: Lettuce Romaine Microgreens
Direct sow outdoors: Mibuna Microgreens
Direct sow outdoors: Miner's Lettuce
Direct sow outdoors: Mizuna Microgreens
Direct sow outdoors: Mugwort
Direct sow outdoors: Mustard
Direct sow outdoors: Mustard Microgreens
Direct sow outdoors: Mustard Sprouts
Direct sow outdoors: New Zealand Spinach
Direct sow outdoors: Oats
Direct sow outdoors: Onion Microgreens
Direct sow outdoors: Orach Microgreens
Direct sow outdoors: Pak Choi Microgreens
Direct sow outdoors: Parsley Microgreens
Direct sow outdoors: Parsnip
Direct sow outdoors: Pea
Direct sow outdoors: Pea Microgreens
Direct sow outdoors: Pea Sprouts
Direct sow outdoors: Peppermint
Direct sow outdoors: Radish
Direct sow outdoors: Radish Microgreens
Direct sow outdoors: Radish Sprouts
Direct sow outdoors: Rapeseed
Direct sow outdoors: Red Clover
Direct sow outdoors: Red-Veined Sorrel
Direct sow outdoors: Rosemary
Direct sow outdoors: Russian Kale Microgreens
Direct sow outdoors: Salsify
Direct sow outdoors: Sheep Sorrel Microgreens
Direct sow outdoors: Shell Pea
Direct sow outdoors: Snap Pea
Direct sow outdoors: Snow Pea
Direct sow outdoors: Sorrel
Direct sow outdoors: Sorrel Microgreens
Direct sow outdoors: Spearmint
Direct sow outdoors: Spinach
Direct sow outdoors: Strawberry
Direct sow outdoors: Sunn Hemp
Direct sow outdoors: Swiss Chard
Direct sow outdoors: Swiss Chard Microgreens
Direct sow outdoors: Tatsoi Microgreens
Direct sow outdoors: Tendergreen Mustard Microgreens
Direct sow outdoors: Turnip Microgreens
Direct sow outdoors: Watercress
Direct sow outdoors: White Clover
Direct sow outdoors: Yellow Sweet Clover
Transplant outdoors: African Daisy
Transplant outdoors: Alyssum
Transplant outdoors: Angelica
Transplant outdoors: Arabis
Transplant outdoors: Armeria
Transplant outdoors: Arroyo Lupine
Transplant outdoors: Artichoke
Transplant outdoors: Arugula
Transplant outdoors: Arugula
Transplant outdoors: Asclepias
Transplant outdoors: Aster
Transplant outdoors: Baby Blue Eyes
Transplant outdoors: Baby's Breath
Transplant outdoors: Basket of Gold
Transplant outdoors: Bee Balm
Transplant outdoors: Beet
Transplant outdoors: Bishop's Flower
Transplant outdoors: Blanket Flower
Transplant outdoors: Blue Flax
Transplant outdoors: Bok Choy
Transplant outdoors: Broccoli
Transplant outdoors: Broccoli Raab
Transplant outdoors: Brussels Sprouts
Transplant outdoors: Bunching Onion
Transplant outdoors: Burdock
Transplant outdoors: Cabbage
Transplant outdoors: Calendula
Transplant outdoors: California Bluebell
Transplant outdoors: Campanula
Transplant outdoors: Candytuft
Transplant outdoors: Canterbury Bells
Transplant outdoors: Cardoon
Transplant outdoors: Carrot
Transplant outdoors: Catchfly
Transplant outdoors: Catnip
Transplant outdoors: Cauliflower
Transplant outdoors: Celeriac
Transplant outdoors: Celery
Transplant outdoors: Celosia
Transplant outdoors: Celosia (Crested)
Transplant outdoors: Celosia (Plume)
Transplant outdoors: Celtuce / Stem Lettuce
Transplant outdoors: Chicory
Transplant outdoors: China Aster
Transplant outdoors: Chinese Broccoli
Transplant outdoors: Chinese Cabbage
Transplant outdoors: Chinese Celery
Transplant outdoors: Chinese Forget-Me-Not
Transplant outdoors: Chive
Transplant outdoors: Chrysanthemum Greens
Transplant outdoors: Clasping Coneflower
Transplant outdoors: Coast Rock Cress
Transplant outdoors: Collard
Transplant outdoors: Columbine
Transplant outdoors: Corn Poppy
Transplant outdoors: Cottage Pink
Transplant outdoors: Dandelion
Transplant outdoors: Delphinium
Transplant outdoors: Echinacea
Transplant outdoors: Endive
Transplant outdoors: English Daisy
Transplant outdoors: Ethiopian Kale
Transplant outdoors: European Columbine
Transplant outdoors: Evening Primrose
Transplant outdoors: Flowering Cabbage
Transplant outdoors: Flowering Kale
Transplant outdoors: Foxglove
Transplant outdoors: Garlic Chives
Transplant outdoors: Geum
Transplant outdoors: Globe Gilia
Transplant outdoors: Hamburg Parsley
Transplant outdoors: Hartweg Lupine
Transplant outdoors: Heuchera
Transplant outdoors: Hollyhock
Transplant outdoors: Horehound
Transplant outdoors: Huauzontle
Transplant outdoors: Hybrid Columbine
Transplant outdoors: Hyssop
Transplant outdoors: Iberis
Transplant outdoors: Iceland Poppy
Transplant outdoors: Johnny Jump-Up
Transplant outdoors: Kale
Transplant outdoors: Kohlrabi
Transplant outdoors: Komatsuna Mustard
Transplant outdoors: Lanceleaf Coreopsis
Transplant outdoors: Large-Flowered Evening Primrose
Transplant outdoors: Larkspur
Transplant outdoors: Lavatera
Transplant outdoors: Leek
Transplant outdoors: Lemon Balm
Transplant outdoors: Lemon Mint
Transplant outdoors: Lettuce
Transplant outdoors: Liatris
Transplant outdoors: Linaria
Transplant outdoors: Linum
Transplant outdoors: Lovage
Transplant outdoors: Lunaria
Transplant outdoors: Lupine
Transplant outdoors: Malva
Transplant outdoors: Mexican Hat
Transplant outdoors: Mibuna
Transplant outdoors: Milkweed (Common)
Transplant outdoors: Milkweed (Tropical)
Transplant outdoors: Misome
Transplant outdoors: Mizuna
Transplant outdoors: Myosotis
Transplant outdoors: New England Aster
Transplant outdoors: Onion
Transplant outdoors: Orach
Transplant outdoors: Oriental Poppy
Transplant outdoors: Ox-Eye Daisy
Transplant outdoors: Palace Purple Heuchera
Transplant outdoors: Pansy
Transplant outdoors: Parsley
Transplant outdoors: Perennial Sweet Pea
Transplant outdoors: Phlox
Transplant outdoors: Plains Coreopsis
Transplant outdoors: Primula
Transplant outdoors: Purple Yu Choy Sum
Transplant outdoors: Radicchio
Transplant outdoors: Rocket Candytuft
Transplant outdoors: Roman Chamomile
Transplant outdoors: Romanesco Broccoli
Transplant outdoors: Rue
Transplant outdoors: Russian Kale
Transplant outdoors: Rutabaga
Transplant outdoors: Sage
Transplant outdoors: Salad Burnet
Transplant outdoors: Scarlet Flax
Transplant outdoors: Shallot
Transplant outdoors: Shasta Daisy
Transplant outdoors: Sheep Sorrel
Transplant outdoors: Showy Evening Primrose
Transplant outdoors: Siberian Kale
Transplant outdoors: Smooth Aster
Transplant outdoors: Snapdragon
Transplant outdoors: Soapwort
Transplant outdoors: Stock Flower
Transplant outdoors: Strawberry Spinach
Transplant outdoors: Sundial Lupine
Transplant outdoors: Sweet Pea
Transplant outdoors: Sweet Woodruff
Transplant outdoors: Tansy
Transplant outdoors: Tarragon
Transplant outdoors: Tat Soi
Transplant outdoors: Texas Bluebonnet
Transplant outdoors: Thyme
Transplant outdoors: Turnip
Transplant outdoors: Viola
Transplant outdoors: Wheat Celosia
Transplant outdoors: Wormwood
Transplant outdoors: Yu Choy Sum
Plant outdoors: Asparagus
Plant outdoors: Blueberry
Plant outdoors: Potato
Plant outdoors: Rhubarb

May

Start hardening off: Ageratum
Start hardening off: Aji Pepper
Start hardening off: Alpine Strawberry
Start hardening off: Alternanthera
Start hardening off: Amaranth
Start hardening off: Amaranthus
Start hardening off: Angel Wing Begonia
Start hardening off: Angelonia
Start hardening off: Armenian Cucumber
Start hardening off: Asparagus Fern
Start hardening off: Bachelor's Button
Start hardening off: Bacopa
Start hardening off: Balsam
Start hardening off: Basil
Start hardening off: Beach Sunflower
Start hardening off: Begonia
Start hardening off: Billy Buttons
Start hardening off: Black Cumin / Nigella
Start hardening off: Black-Eyed Susan
Start hardening off: Bolivian Begonia
Start hardening off: Brachycome
Start hardening off: California Poppy
Start hardening off: Canna
Start hardening off: Cape Gooseberry
Start hardening off: Carnation
Start hardening off: Chamomile
Start hardening off: Chiltepin Pepper
Start hardening off: Chinese Toon
Start hardening off: Chrysanthemum
Start hardening off: Cleome
Start hardening off: Coleus
Start hardening off: Common Morning Glory
Start hardening off: Cosmos
Start hardening off: Cucamelon
Start hardening off: Cucumber
Start hardening off: Dahlberg Daisy
Start hardening off: Dahlia
Start hardening off: Dianthus
Start hardening off: Dichondra
Start hardening off: Dove Pincushion
Start hardening off: Dracaena
Start hardening off: Dusty Miller
Start hardening off: Eggplant
Start hardening off: Epazote
Start hardening off: Ethiopian Eggplant
Start hardening off: Feverfew
Start hardening off: Flowering Tobacco
Start hardening off: Four O Clock
Start hardening off: French Marigold
Start hardening off: Gazania
Start hardening off: Geranium
Start hardening off: Goldmoss Stonecrop
Start hardening off: Gomphrena
Start hardening off: Gourd (Angled Luffa)
Start hardening off: Gourd (Bitter)
Start hardening off: Gourd (Bottle)
Start hardening off: Gourd (Luffa)
Start hardening off: Gourd (Ornamental)
Start hardening off: Gourd (Turban)
Start hardening off: Gourd (Wax)
Start hardening off: Grain Amaranth
Start hardening off: Ground Cherry
Start hardening off: Gypsophila
Start hardening off: Heliotrope
Start hardening off: Hibiscus
Start hardening off: Holy Basil
Start hardening off: Hybrid Lobelia
Start hardening off: Hypoestes
Start hardening off: Impatiens
Start hardening off: Interspecific Dianthus
Start hardening off: Ivy Geranium
Start hardening off: Kniphofia
Start hardening off: Korean Mint
Start hardening off: Korean Summer Squash
Start hardening off: Lace Fern
Start hardening off: Lavender
Start hardening off: Lemon Basil
Start hardening off: Lime Basil
Start hardening off: Lobelia
Start hardening off: Love-in-a-Mist
Start hardening off: Love-Lies-Bleeding
Start hardening off: Malabar Spinach
Start hardening off: Marigold
Start hardening off: Marjoram
Start hardening off: Maximilian Sunflower
Start hardening off: Melon
Start hardening off: Melon (Pickling)
Start hardening off: Mexican Sunflower
Start hardening off: Mexican Tarragon
Start hardening off: Mexican Zinnia
Start hardening off: Mimosa
Start hardening off: Mimulus
Start hardening off: Moonflower
Start hardening off: Morning Glory
Start hardening off: Narrowleaf Zinnia
Start hardening off: Nicotiana
Start hardening off: Nierembergia
Start hardening off: Okra
Start hardening off: Ornamental Millet
Start hardening off: Osteospermum
Start hardening off: Painted Sage
Start hardening off: Paracress
Start hardening off: Penstemon
Start hardening off: Pepper (Habanero)
Start hardening off: Pepper (Hot)
Start hardening off: Pepper (Sweet & Hot)
Start hardening off: Pepper (Tabasco)
Start hardening off: Peruvian Verbena
Start hardening off: Petunia
Start hardening off: Phacelia
Start hardening off: Plectranthus
Start hardening off: Poppy
Start hardening off: Portulaca
Start hardening off: Pumpkin
Start hardening off: Pumpkin (Maxima)
Start hardening off: Pumpkin (Moschata)
Start hardening off: Ricinus
Start hardening off: Rocky Mountain Penstemon
Start hardening off: Roselle
Start hardening off: Rudbeckia
Start hardening off: Salpiglossis
Start hardening off: Salvia
Start hardening off: Saponaria
Start hardening off: Scabiosa
Start hardening off: Scarlet Sage
Start hardening off: Sedum
Start hardening off: Shiso
Start hardening off: Signet Marigold
Start hardening off: Silver Ponysfoot
Start hardening off: Sprenger Fern
Start hardening off: Statice
Start hardening off: Stevia
Start hardening off: Stipa
Start hardening off: Sulphur Cosmos
Start hardening off: Summer Savory
Start hardening off: Summer Squash
Start hardening off: Sweet Annie
Start hardening off: Texas Sage
Start hardening off: Thai Basil
Start hardening off: Thunbergia
Start hardening off: Tomatillo
Start hardening off: Tomato
Start hardening off: Torenia
Start hardening off: Verbena
Start hardening off: Vietnamese Culantro
Start hardening off: Vinca
Start hardening off: Water Pepper
Start hardening off: Watermelon
Start hardening off: Wax Begonia
Start hardening off: West Indian Gherkin
Start hardening off: Western Coneflower
Start hardening off: Wild Arugula
Start hardening off: Winged Bean
Start hardening off: Winter Squash (Acorn)
Start hardening off: Winter Squash (Banana)
Start hardening off: Winter Squash (Buttercup)
Start hardening off: Winter Squash (Butternut)
Start hardening off: Winter Squash (Cushaw)
Start hardening off: Winter Squash (Delicata)
Start hardening off: Winter Squash (Hubbard)
Start hardening off: Winter Squash (Spaghetti)
Start hardening off: Woodland Sage
Start hardening off: Woodland Tobacco
Start hardening off: Yarrow
Start hardening off: Zinnia
Direct sow outdoors: Amaranth Microgreens
Direct sow outdoors: Anise
Direct sow outdoors: Anise Microgreens
Direct sow outdoors: Basil Microgreens
Direct sow outdoors: Bean
Direct sow outdoors: Buckwheat
Direct sow outdoors: Cantaloupe Microgreens
Direct sow outdoors: Corn
Direct sow outdoors: Cowpea
Direct sow outdoors: Cumin
Direct sow outdoors: Fenugreek
Direct sow outdoors: Garbanzo Bean Sprouts
Direct sow outdoors: Iresine
Direct sow outdoors: Lemongrass
Direct sow outdoors: Lima Bean
Direct sow outdoors: Mung Bean Sprouts
Direct sow outdoors: Nasturtium Microgreens
Direct sow outdoors: Oregano (Greek)
Direct sow outdoors: Oregano Microgreens
Direct sow outdoors: Pea Shoots
Direct sow outdoors: Purslane
Direct sow outdoors: Runner Bean
Direct sow outdoors: Shiso Herb Microgreens
Direct sow outdoors: Shiso Microgreens
Direct sow outdoors: Sorghum
Direct sow outdoors: Soy Bean
Direct sow outdoors: Soybean Sprouts
Direct sow outdoors: Sunflower
Direct sow outdoors: Sunflower Microgreens
Direct sow outdoors: Sunflower Sprouts
Direct sow outdoors: Sweet William
Direct sow outdoors: Wheat
Direct sow outdoors: Yardlong Bean
Transplant outdoors: Achillea
Transplant outdoors: Agastache
Transplant outdoors: Ageratum
Transplant outdoors: Aji Pepper
Transplant outdoors: Alpine Strawberry
Transplant outdoors: Alternanthera
Transplant outdoors: Amaranth
Transplant outdoors: Amaranthus
Transplant outdoors: Angel Wing Begonia
Transplant outdoors: Angelonia
Transplant outdoors: Armenian Cucumber
Transplant outdoors: Asparagus Fern
Transplant outdoors: Bachelor's Button
Transplant outdoors: Bacopa
Transplant outdoors: Balsam
Transplant outdoors: Basil
Transplant outdoors: Beach Sunflower
Transplant outdoors: Begonia
Transplant outdoors: Billy Buttons
Transplant outdoors: Black Cumin / Nigella
Transplant outdoors: Black-Eyed Susan
Transplant outdoors: Blue Fescue
Transplant outdoors: Bolivian Begonia
Transplant outdoors: Brachycome
Transplant outdoors: California Poppy
Transplant outdoors: Canna
Transplant outdoors: Cape Gooseberry
Transplant outdoors: Carnation
Transplant outdoors: Chamomile
Transplant outdoors: Chiltepin Pepper
Transplant outdoors: Chinese Toon
Transplant outdoors: Chrysanthemum
Transplant outdoors: Cleome
Transplant outdoors: Coleus
Transplant outdoors: Common Morning Glory
Transplant outdoors: Coreopsis
Transplant outdoors: Cosmos
Transplant outdoors: Creeping Thyme
Transplant outdoors: Cucamelon
Transplant outdoors: Cucumber
Transplant outdoors: Dahlberg Daisy
Transplant outdoors: Dahlia
Transplant outdoors: Delosperma
Transplant outdoors: Dianthus
Transplant outdoors: Dichondra
Transplant outdoors: Dove Pincushion
Transplant outdoors: Dracaena
Transplant outdoors: Dusty Miller
Transplant outdoors: Eggplant
Transplant outdoors: Epazote
Transplant outdoors: Ethiopian Eggplant
Transplant outdoors: Feverfew
Transplant outdoors: Flowering Tobacco
Transplant outdoors: Four O Clock
Transplant outdoors: French Marigold
Transplant outdoors: Gaillardia
Transplant outdoors: Gazania
Transplant outdoors: Geranium
Transplant outdoors: Goldmoss Stonecrop
Transplant outdoors: Gomphrena
Transplant outdoors: Gourd (Angled Luffa)
Transplant outdoors: Gourd (Bitter)
Transplant outdoors: Gourd (Bottle)
Transplant outdoors: Gourd (Luffa)
Transplant outdoors: Gourd (Ornamental)
Transplant outdoors: Gourd (Turban)
Transplant outdoors: Gourd (Wax)
Transplant outdoors: Grain Amaranth
Transplant outdoors: Ground Cherry
Transplant outdoors: Gypsophila
Transplant outdoors: Heliopsis
Transplant outdoors: Heliotrope
Transplant outdoors: Hibiscus
Transplant outdoors: Holy Basil
Transplant outdoors: Hybrid Coneflower
Transplant outdoors: Hybrid Lobelia
Transplant outdoors: Hypoestes
Transplant outdoors: Impatiens
Transplant outdoors: Interspecific Dianthus
Transplant outdoors: Ivy Geranium
Transplant outdoors: Japanese Mugwort
Transplant outdoors: Kniphofia
Transplant outdoors: Korean Mint
Transplant outdoors: Korean Summer Squash
Transplant outdoors: Lace Fern
Transplant outdoors: Lavender
Transplant outdoors: Lemon Basil
Transplant outdoors: Lime Basil
Transplant outdoors: Lobelia
Transplant outdoors: Love-in-a-Mist
Transplant outdoors: Love-Lies-Bleeding
Transplant outdoors: Malabar Spinach
Transplant outdoors: Marigold
Transplant outdoors: Marjoram
Transplant outdoors: Maximilian Sunflower
Transplant outdoors: Melon
Transplant outdoors: Melon (Pickling)
Transplant outdoors: Mexican Sunflower
Transplant outdoors: Mexican Tarragon
Transplant outdoors: Mexican Zinnia
Transplant outdoors: Mimosa
Transplant outdoors: Mimulus
Transplant outdoors: Mitsuba
Transplant outdoors: Moonflower
Transplant outdoors: Morning Glory
Transplant outdoors: Narrowleaf Zinnia
Transplant outdoors: Nasturtium
Transplant outdoors: Nicotiana
Transplant outdoors: Nierembergia
Transplant outdoors: Okra
Transplant outdoors: Oregano
Transplant outdoors: Ornamental Millet
Transplant outdoors: Osteospermum
Transplant outdoors: Painted Sage
Transplant outdoors: Paracress
Transplant outdoors: Pennyroyal Mint
Transplant outdoors: Penstemon
Transplant outdoors: Pepper (Habanero)
Transplant outdoors: Pepper (Hot)
Transplant outdoors: Pepper (Sweet & Hot)
Transplant outdoors: Pepper (Tabasco)
Transplant outdoors: Peruvian Verbena
Transplant outdoors: Petunia
Transplant outdoors: Phacelia
Transplant outdoors: Plectranthus
Transplant outdoors: Poppy
Transplant outdoors: Portulaca
Transplant outdoors: Pumpkin
Transplant outdoors: Pumpkin (Maxima)
Transplant outdoors: Pumpkin (Moschata)
Transplant outdoors: Ricinus
Transplant outdoors: Rocky Mountain Penstemon
Transplant outdoors: Roselle
Transplant outdoors: Rudbeckia
Transplant outdoors: Russian Sage
Transplant outdoors: Salpiglossis
Transplant outdoors: Salvia
Transplant outdoors: Saponaria
Transplant outdoors: Savory
Transplant outdoors: Scabiosa
Transplant outdoors: Scarlet Sage
Transplant outdoors: Sedum
Transplant outdoors: Shiso
Transplant outdoors: Signet Marigold
Transplant outdoors: Silver Ponysfoot
Transplant outdoors: Sprenger Fern
Transplant outdoors: Statice
Transplant outdoors: Stevia
Transplant outdoors: Stipa
Transplant outdoors: Strawflower
Transplant outdoors: Sulphur Cosmos
Transplant outdoors: Summer Savory
Transplant outdoors: Summer Squash
Transplant outdoors: Sweet Annie
Transplant outdoors: Texas Sage
Transplant outdoors: Thai Basil
Transplant outdoors: Thunbergia
Transplant outdoors: Tomatillo
Transplant outdoors: Tomato
Transplant outdoors: Torenia
Transplant outdoors: Veined Catmint
Transplant outdoors: Verbena
Transplant outdoors: Veronica
Transplant outdoors: Vietnamese Culantro
Transplant outdoors: Vinca
Transplant outdoors: Water Pepper
Transplant outdoors: Watermelon
Transplant outdoors: Wax Begonia
Transplant outdoors: West Indian Gherkin
Transplant outdoors: Western Coneflower
Transplant outdoors: Wild Arugula
Transplant outdoors: Winged Bean
Transplant outdoors: Winter Squash (Acorn)
Transplant outdoors: Winter Squash (Banana)
Transplant outdoors: Winter Squash (Buttercup)
Transplant outdoors: Winter Squash (Butternut)
Transplant outdoors: Winter Squash (Cushaw)
Transplant outdoors: Winter Squash (Delicata)
Transplant outdoors: Winter Squash (Hubbard)
Transplant outdoors: Winter Squash (Spaghetti)
Transplant outdoors: Woodland Sage
Transplant outdoors: Woodland Tobacco
Transplant outdoors: Yarrow
Transplant outdoors: Zinnia

July

Direct sow outdoors: Annual Ryegrass
Direct sow outdoors: Crimson Clover
Direct sow outdoors: Hairy Vetch
Direct sow outdoors: Rye

August

Plant outdoors: Elephant Garlic
Plant outdoors: Garlic

Understand your frost dates

More Colorado planting calendars

ZIP codes in Fort Collins

80521, 80524, 80525, 80526, 80528

Frost dates are NOAA 1991–2020 climate normals for a representative location in Fort Collins, CO (covering 5 ZIPs); your exact dates depend on your address. Schedules are guidance, not guarantees.