What to plant in March in zone 3a
187 crops to start indoors, direct sow, transplant, or harvest in March in USDA hardiness zone 3a. Typical last spring frost around May 21, 2026, first fall frost around Sep 22, 2026 — exact dates vary by location within the zone.
Want exact March dates for your address in zone 3a, a drag-and-drop bed layout, and sowing reminders? Enter your ZIP:
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Start indoors
Sow these under lights or on a windowsill now for transplants later.
- Achillea
- Agastache
- Aji Pepper
- Alpine Strawberry
- Angel Wing Begonia
- Angelica
- Angelonia
- Arabis
- Armeria
- Arroyo Lupine
- Arugula
- Arugula
- Asclepias
- Asparagus Fern
- Aster
- Bacopa
- Basket of Gold
- Bee Balm
- Beet
- Begonia
- Bishop's Flower
- Bok Choy
- Bolivian Begonia
- Broccoli
- Broccoli Raab
- Brussels Sprouts
- Cabbage
- California Bluebell
- Campanula
- Canna
- Canterbury Bells
- Cardoon
- Carnation
- Catnip
- Cauliflower
- Celtuce / Stem Lettuce
- Chicory
- China Aster
- Chinese Broccoli
- Chinese Cabbage
- Chinese Forget-Me-Not
- Chive
- Clasping Coneflower
- Coast Rock Cress
- Coleus
- Collard
- Columbine
- Corn Poppy
- Cottage Pink
- Creeping Thyme
- Delphinium
- Dove Pincushion
- Dracaena
- Dusty Miller
- Echinacea
- Endive
- English Daisy
- European Columbine
- Evening Primrose
- Flowering Cabbage
- Flowering Kale
- Foxglove
- Garlic Chives
- Geranium
- Geum
- Goldmoss Stonecrop
- Hamburg Parsley
- Hartweg Lupine
- Heliotrope
- Heuchera
- Hollyhock
- Horehound
- Hybrid Columbine
- Hybrid Coneflower
- Hybrid Lobelia
- Hypoestes
- Hyssop
- Iberis
- Iceland Poppy
- Impatiens
- Ivy Geranium
- Japanese Mugwort
- Johnny Jump-Up
- Kale
- Kniphofia
- Kohlrabi
- Komatsuna Mustard
- Lanceleaf Coreopsis
- Large-Flowered Evening Primrose
- Larkspur
- Lavatera
- Lavender
- Lemon Balm
- Lemon Mint
- Lettuce
- Liatris
- Linaria
- Lobelia
- Lovage
- Lunaria
- Lupine
- Malva
- Marjoram
- Mexican Hat
- Mexican Tarragon
- Mibuna
- Milkweed (Common)
- Milkweed (Tropical)
- Mimosa
- Mimulus
- Mitsuba
- Mizuna
- Myosotis
- New England Aster
- Nierembergia
- Oregano
- Oriental Poppy
- Osteospermum
- Ox-Eye Daisy
- Painted Sage
- Palace Purple Heuchera
- Pansy
- Paracress
- Parsley
- Pennyroyal Mint
- Penstemon
- Pepper (Habanero)
- Pepper (Sweet & Hot)
- Peruvian Verbena
- Petunia
- Phlox
- Plains Coreopsis
- Plectranthus
- Purple Yu Choy Sum
- Radicchio
- Rocket Candytuft
- Rocky Mountain Penstemon
- Roman Chamomile
- Romanesco Broccoli
- Rudbeckia
- Rue
- Russian Kale
- Russian Sage
- Rutabaga
- Sage
- Salad Burnet
- Salpiglossis
- Salvia
- Saponaria
- Savory
- Scarlet Sage
- Sedum
- Shasta Daisy
- Sheep Sorrel
- Showy Evening Primrose
- Siberian Kale
- Smooth Aster
- Snapdragon
- Soapwort
- Sprenger Fern
- Statice
- Stevia
- Stipa
- Stock Flower
- Sundial Lupine
- Sweet Pea
- Sweet Woodruff
- Tansy
- Tarragon
- Tat Soi
- Texas Bluebonnet
- Texas Sage
- Thyme
- Torenia
- Turnip
- Veined Catmint
- Verbena
- Veronica
- Vietnamese Culantro
- Vinca
- Viola
- Wax Begonia
- Western Coneflower
- Woodland Sage
- Woodland Tobacco
- Wormwood
- Yu Choy Sum
Keep going
Timings use NOAA 1991–2020 climate normals for a representative location (ZIP 99602) in zone 3a, computed with the same engine as GardenDraft’s in-app schedule. Guidance, not guarantees — your exact dates depend on your address.