Quick planting window
| Start indoors | November to December |
|---|---|
| Transplant | January to February |
| Sow seeds | January to February |
| Estimated harvest | April to May |
| Risk | Medium risk |
Month calendar
Scan the year by month to see seed starting, sowing, transplanting, and harvest timing.
Onion is a reasonable spring choice for Florida if you adjust for your local microclimate.
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
110
Covered states
Florida
Frost window
January to February / December to January
North, Central, and South Florida can differ by months; use local Extension timing before planting.
Onion growing notes
The calendar window is only the first step. These growing details affect survival, plant vigor, and harvest quality.
Sun
Full sun.
Soil
Loose, fertile soil with good drainage.
Spacing
4-6 inches for bulbs.
Container
Use wide containers at least 8-10 inches deep.
Watering
Keep evenly moist during bulb formation.
Common mistake
Choosing the wrong day-length onion type.
Beginner tip
Use sets or transplants if seed timing feels too long.
Month window table
| Crop | Spring transplant / sow | Spring harvest | Fall transplant / sow | Fall harvest |
|---|---|---|---|---|
| Onion | January to February | April to May | September to October | December to January |
Sources and limits
This page uses Florida 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 onion seeds indoors in Florida?
For spring, the indoor seed-starting window is about November to December. Move later if your local frost date is later than the state average.
When should I transplant onion in Florida?
For spring, the transplant window is about January to February. Harden seedlings off before planting outside.
Can I sow onion outdoors in Florida?
Yes. The spring outdoor sowing window is about January to February, assuming soil and night temperatures are suitable.
When can I harvest onion in Florida?
Spring planting estimates a harvest around April to May; fall planting estimates about December to January. Variety and weather can shift this by several weeks.
Is onion risky in Florida?
Onion is a reasonable spring choice for Florida if you adjust for your local microclimate. For fall: Onion is a reasonable fall choice for Florida if you adjust for your local microclimate.
Do local differences inside Florida matter?
North, Central, and South Florida can differ by months; use local Extension timing before planting. 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 onion?
Full sun. Loose, fertile soil with good drainage. Common mistake: Choosing the wrong day-length onion type.
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.