What to plant in May in zone 4a
119 crops to start indoors, direct sow, or transplant in May in USDA hardiness zone 4a. Typical last spring frost around May 12, 2026, first fall frost around Oct 3, 2026 — exact dates vary by location within the zone.
Zone 4a covers a lot of ground. Enter your ZIP for May dates from your nearest weather station and a month-by-month calendar:
Start indoors
Sow these under lights or on a windowsill now for transplants later.
- Armenian Cucumber
- Cucamelon
- Cucumber
- Gourd (Angled Luffa)
- Gourd (Bitter)
- Gourd (Bottle)
- Gourd (Luffa)
- Gourd (Ornamental)
- Gourd (Turban)
- Gourd (Wax)
- Korean Summer Squash
- Melon
- Melon (Pickling)
- Okra
- Pumpkin
- Pumpkin (Maxima)
- Pumpkin (Moschata)
- Summer Squash
- Watermelon
- West Indian Gherkin
- Winter Squash (Acorn)
- Winter Squash (Banana)
- Winter Squash (Buttercup)
- Winter Squash (Butternut)
- Winter Squash (Cushaw)
- Winter Squash (Delicata)
- Winter Squash (Hubbard)
- Winter Squash (Spaghetti)
Direct sow outside
Sow these straight into the garden bed this month.
Transplant outdoors
Move these hardened-off seedlings into the garden.
- Achillea
- Agastache
- Angelica
- Artichoke
- Bee Balm
- Bishop's Flower
- Burdock
- Calendula
- Cardoon
- Catnip
- Celeriac
- Celery
- Celtuce / Stem Lettuce
- Chamomile
- Chicory
- Chinese Celery
- Chive
- Chrysanthemum Greens
- Clasping Coneflower
- Creeping Thyme
- Dandelion
- Echinacea
- Endive
- Ethiopian Kale
- Evening Primrose
- Feverfew
- Garlic Chives
- Hamburg Parsley
- Horehound
- Huauzontle
- Hybrid Coneflower
- Hyssop
- Japanese Mugwort
- Komatsuna Mustard
- Lemon Balm
- Lemon Mint
- Lettuce
- Lovage
- Mibuna
- Misome
- Mitsuba
- Mizuna
- Nasturtium
- Orach
- Oregano
- Parsley
- Pennyroyal Mint
- Purple Yu Choy Sum
- Radicchio
- Roman Chamomile
- Rue
- Russian Sage
- Sage
- Salad Burnet
- Savory
- Sheep Sorrel
- Soapwort
- Strawberry Spinach
- Sweet Annie
- Sweet Woodruff
- Tansy
- Tarragon
- Thyme
- Veined Catmint
- Wild Arugula
- Wormwood
- Yarrow
- Yu Choy Sum
Plant out
Set out these crops (sets, tubers, or starts) now.
Keep going
Timings use NOAA 1991–2020 climate normals for a representative location (Stanton, ND) in zone 4a, computed with the same engine as GardenDraft’s in-app schedule. Guidance, not guarantees — your exact dates depend on your address.