Quick planting window
| Start indoors | February to March |
|---|---|
| Transplant | February to March |
| Sow seeds | February to March |
| Estimated harvest | March to April |
| Risk | High risk |
Month calendar
Scan the year by month to see seed starting, sowing, transplanting, and harvest timing.
Lettuce can struggle in Arizona heat. Favor shoulder-season timing and provide afternoon shade.
Next: ZIP code personalization
This is a state-level planning window based on typical frost timing and crop rules. Use local Extension guidance or a ZIP code frost-date tool before planting.
Planning notes
Days to maturity
45
Covered states
Arizona
Frost window
February to April / October to December
Low desert gardens often plant cool-season crops in fall and winter; high elevation gardens are much shorter season.
Lettuce growing notes
The calendar window is only the first step. These growing details affect survival, plant vigor, and harvest quality.
Sun
Full sun in cool weather; afternoon shade in heat.
Soil
Loose, fertile soil that stays evenly moist.
Spacing
6-12 inches depending on head size.
Container
Very container friendly; shallow boxes work for leaf lettuce.
Watering
Keep moist to reduce bitterness and bolting.
Common mistake
Planting too late into summer heat.
Beginner tip
Sow small batches every 1-2 weeks for a longer harvest.
Month window table
| Crop | Spring transplant / sow | Spring harvest | Fall transplant / sow | Fall harvest |
|---|---|---|---|---|
| Lettuce | February to March | March to April | September to October | November to December |
Sources and limits
This page uses Arizona state-level frost windows, USDA zone ranges, and crop rules for planning. It does not replace local Extension or county-level guidance.
FAQ
When should I start lettuce seeds indoors in Arizona?
For spring, the indoor seed-starting window is about February to March. Move later if your local frost date is later than the state average.
When should I transplant lettuce in Arizona?
For spring, the transplant window is about February to March. Harden seedlings off before planting outside.
Can I sow lettuce outdoors in Arizona?
Yes. The spring outdoor sowing window is about February to March, assuming soil and night temperatures are suitable.
When can I harvest lettuce in Arizona?
Spring planting estimates a harvest around March to April; fall planting estimates about November to December. Variety and weather can shift this by several weeks.
Is lettuce risky in Arizona?
Lettuce can struggle in Arizona heat. Favor shoulder-season timing and provide afternoon shade. For fall: Lettuce is a reasonable fall choice for Arizona if you adjust for your local microclimate.
Do local differences inside Arizona matter?
Low desert gardens often plant cool-season crops in fall and winter; high elevation gardens are much shorter season. Treat this as a state-level starter window and confirm with a local Extension or frost-date tool before planting.
What growing details matter most for lettuce?
Full sun in cool weather; afternoon shade in heat. Loose, fertile soil that stays evenly moist. Common mistake: Planting too late into summer heat.
Is this ZIP-code accurate?
No. This page uses state-level windows; ZIP-code frost dates, USDA zone matching, and reminder calendars are planned for the next phase.