What to plant in March in zone 1a
57 crops to start indoors, direct sow, or transplant in March in USDA hardiness zone 1a. Typical last spring frost around May 25, 2026, first fall frost around Aug 26, 2026 — exact dates vary by location within the zone.
Zone 1a 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.
- Agastache
- Alpine Strawberry
- Angelica
- Arugula
- Bee Balm
- Bishop's Flower
- Bok Choy
- Broccoli
- Broccoli Raab
- Brussels Sprouts
- Cabbage
- Cardoon
- Catnip
- Cauliflower
- Chinese Broccoli
- Chinese Cabbage
- Chive
- Clasping Coneflower
- Collard
- Creeping Thyme
- Echinacea
- Evening Primrose
- Garlic Chives
- Hamburg Parsley
- Horehound
- Hybrid Coneflower
- Hyssop
- Japanese Mugwort
- Kale
- Kohlrabi
- Lavender
- Lemon Balm
- Lemon Mint
- Lovage
- Oregano
- Parsley
- Pennyroyal Mint
- Pepper (Habanero)
- Pepper (Sweet & Hot)
- Roman Chamomile
- Romanesco Broccoli
- Rue
- Russian Kale
- Russian Sage
- Sage
- Salad Burnet
- Savory
- Sheep Sorrel
- Siberian Kale
- Soapwort
- Sweet Woodruff
- Tansy
- Tarragon
- Tat Soi
- Thyme
- Veined Catmint
- Wormwood
Keep going
Timings use NOAA 1991–2020 climate normals for a representative location (ZIP 99788) in zone 1a, computed with the same engine as GardenDraft’s in-app schedule. Guidance, not guarantees — your exact dates depend on your address.