USDA Zone 2 planting calendar
When to plant lettuce in USDA zone 2
Sowing, transplant, and harvest dates calibrated to zone 2's 90-day season (Northern Alaska, parts of northern Canada).
Key dates for lettuce in zone 2
| Stage | When | Anchor |
|---|---|---|
| Indoor seed start | early May (May 8) | 4 weeks before last frost |
| Outdoor transplant | mid-May (May 15) | 21 days before last frost (early June) |
| First harvest (estimate) | early July (July 4) | ~50 days from transplant |
Dates are zone-wide averages. Local microclimates (south-facing slopes, urban heat, lakeside warmth, elevation) can shift the planting window by 1-2 weeks within the same zone.
Why this timing works for zone 2
Zone 2 has average annual minimum temperatures of -50 to -40°F and a 90-day frost-free window from early June to late August. Lettuce are hardy enough to handle light frost — and in fact prefer cool weather. They bolt or turn bitter once daytime temperatures consistently climb above 24 °C, which is why earlier is better in zone 2.
Lettuce is genuinely cold-hardy — direct-sow as soon as soil can be worked, 2-4 weeks before the last spring frost. It bolts and turns bitter in summer heat above 24 °C, so southern zones grow it as a winter and shoulder-season crop instead of in midsummer.
Quick-grow guide
- Sun: Full sun in cool weather, light shade in heat.
- Soil temperature for germination: 10-21 °C (50-70 °F).
- Spacing: 6-12 inches (15-30 cm) between plants.
- Days to harvest from transplant: ~50 days.
- Plant in cool weather and provide afternoon shade once temperatures climb above 24 °C.
Common mistakes — zone 2 × lettuce
- Planting before last frost: zone 2's last frost averages early June, and even a light frost will kill lettuce seedlings overnight.
- Skipping hardening off: even healthy indoor transplants need 7-10 days of progressive outdoor exposure before going in the ground.
Source and methodology
Frost-date averages from NOAA Climate Data Online within each USDA hardiness zone. Hardiness zone boundaries from the USDA Plant Hardiness Zone Map (2023). Crop timing offsets calibrated against US Cooperative Extension Service publications (UNL, UMN, NC State, Texas A&M, UF/IFAS) and cross-checked against the RHS sowing calendar for en-GB readers. Curated by the Growli editorial team.
Keep going
- How to grow lettuce — full guide
- USDA Zone 2 — frost dates and what else to plant
- All 13 USDA hardiness zones
Same crop, nearby zones
- When to plant lettuce in USDA zone 1
- When to plant lettuce in USDA zone 3
- When to plant lettuce in USDA zone 4