Can You Grow Microgreens in Zone 1a?
Quick Answer:
✅ Yes — Microgreens grow indoors here regardless of outdoor conditions — they are a year-round indoor crop.
✅ Yes
Microgreens grows well in Zone 1a
Microgreens grow indoors here regardless of outdoor conditions — they are a year-round indoor crop.
📅 When to Plant in Zone 1a
Direct Sow
Jul 1
Last Sow Date
Jun 24
🌾 Harvest
Jul 8 – Jul 22
Based on Zone 1a's average last frost of early July and first frost of mid-July.
🌱 Growing Microgreens in Zone 1a
Sow seeds densely in a shallow tray with seed-starting mix. Keep moist and bright or under a grow light. Harvest with scissors just above soil level when first true leaves appear.
🏠 Indoor Viable💧 Hydroponic OK
🗺️ USDA Plant Hardiness Zones
Zone 1 is shown in
this colour
on the map below
2023 USDA Plant Hardiness Zone Map — public domain. USDA Agricultural Research Service
USDA zones run 1a–13b (26 half-zones). Each full zone above covers both the a and b half-zones. Browse all US zones →
Technical climate details for Zone 1a
- USDA Zone
- 1a
- Last Frost
- early July
- First Frost
- mid-July
- Frost-Free Days
- 14
- Microgreens Zone Range
- 1a – 11b
- Days to Harvest
- 7–21 days
Frequently Asked Questions
Microgreens grow indoors here regardless of outdoor conditions — they are a year-round indoor crop.
Zone 1a is in USDA Hardiness Zone 1a with approximately 14 frost-free days per year.
Microgreens grows in USDA Zones 1a–11b.
Microgreens is beginner-friendly and one of the easier crops to grow.