What to plant in March in zone 4b
77 crops to start indoors, direct sow, or transplant in March in USDA hardiness zone 4b. Typical last spring frost around May 8, 2026, first fall frost around Oct 3, 2026 — exact dates vary by location within the zone.
Zone 4b covers a lot of ground. Enter your ZIP for March 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.
- Achillea
- Agastache
- Aji Pepper
- Alpine Strawberry
- Angelica
- Bee Balm
- Bishop's Flower
- Bok Choy
- Broccoli
- Broccoli Raab
- Brussels Sprouts
- Cabbage
- Calendula
- Cardoon
- Catnip
- Cauliflower
- Celtuce / Stem Lettuce
- Chicory
- Chiltepin Pepper
- Chinese Broccoli
- Chinese Cabbage
- Chrysanthemum Greens
- Clasping Coneflower
- Collard
- Creeping Thyme
- Dandelion
- Echinacea
- Eggplant
- Endive
- Ethiopian Eggplant
- Ethiopian Kale
- Evening Primrose
- Hamburg Parsley
- Hybrid Coneflower
- Hyssop
- Japanese Mugwort
- Kale
- Kohlrabi
- Komatsuna Mustard
- Lavender
- Lemon Balm
- Lemon Mint
- Lettuce
- Lovage
- Marjoram
- Mexican Tarragon
- Mibuna
- Mitsuba
- Mizuna
- Oregano
- Paracress
- Parsley
- Pennyroyal Mint
- Pepper (Habanero)
- Pepper (Hot)
- Pepper (Sweet & Hot)
- Pepper (Tabasco)
- Purple Yu Choy Sum
- Radicchio
- Roman Chamomile
- Romanesco Broccoli
- Rue
- Russian Kale
- Russian Sage
- Salad Burnet
- Savory
- Sheep Sorrel
- Soapwort
- Stevia
- Sweet Woodruff
- Tansy
- Tat Soi
- Veined Catmint
- Vietnamese Culantro
- Wormwood
- Yarrow
- Yu Choy Sum
Keep going
Timings use NOAA 1991–2020 climate normals for a representative location (Utica, MN) in zone 4b, computed with the same engine as GardenDraft’s in-app schedule. Guidance, not guarantees — your exact dates depend on your address.