When to Plant Onions in Florida
Florida spans USDA hardiness 8b to 11b (zones 8b to 11b on this page). Plant onions by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 8b · Zone 9a · Zone 9b · Zone 10a · Zone 10b · Zone 11a · Zone 11b
Onions planting calendar for Florida, Zone 8b
Average last spring frost
March 20
Average first fall frost
November 20
Direct sow
Dec 26
Projected first harvest
Apr 15
Most onions mature in about 90 to 110 days depending on the variety. Full zone 8 guide (both 8a and 8b) →
Onions planting calendar for Florida, Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
Direct sow
Dec 7
Projected first harvest
Mar 27
Most onions mature in about 90 to 110 days depending on the variety. Full zone 9 guide (both 9a and 9b) →
Onions planting calendar for Florida, Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
Direct sow
Nov 23
Projected first harvest
Mar 13
Most onions mature in about 90 to 110 days depending on the variety. Full zone 9 guide (both 9a and 9b) →
Onions planting calendar for Florida, Zone 10a
Average last spring frost
January 30
Average first fall frost
December 30
Direct sow
Nov 7
Projected first harvest
Feb 25
Most onions mature in about 90 to 110 days depending on the variety. Full zone 10 guide (both 10a and 10b) →
Onions planting calendar for Florida, Zone 10b
Average last spring frost
January 30
Average first fall frost
December 30
Direct sow
Nov 7
Projected first harvest
Feb 25
Most onions mature in about 90 to 110 days depending on the variety. Full zone 10 guide (both 10a and 10b) →
Onions planting calendar for Florida, Zone 11a
Zone 11a doesn't get a seasonal frost — onions plants on a warm/cool-season calendar instead of frost dates.
Best planting window
Year-round
Time to harvest
~110 days
🌴 Your zone never frosts, so planting is timed to the cooler vs. warmer seasons rather than a frost date.
Most onions mature in about 90 to 110 days depending on the variety.
Onions planting calendar for Florida, Zone 11b
Zone 11b doesn't get a seasonal frost — onions plants on a warm/cool-season calendar instead of frost dates.
Best planting window
Year-round
Time to harvest
~110 days
🌴 Your zone never frosts, so planting is timed to the cooler vs. warmer seasons rather than a frost date.
Most onions mature in about 90 to 110 days depending on the variety.
Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
8 varieties of onions in the HomeSown library. Tap any for its full grow guide.
Common problems with onions
What to watch for, with identification and treatment for each
🌱 Grow onions with a calendar built for your exact yard
HomeSown turns your ZIP code into a personalized planting calendar, watering reminders, and pest help. Free to start.
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