When to Plant Onions in Zone 8
In USDA zone 8a, plant outdoors January 7 to April 27, and expect your first harvest around April 27. (8a shown here — see 8a and 8b dates separately below.)
Onions planting calendar for USDA Zone 8a
Average last spring frost
April 1
Average first fall frost
November 10
Direct sow
Jan 7
Projected first harvest
Apr 27
Most onions mature in about 90 to 110 days depending on the variety, needing roughly 223 frost-free days in zone 8a.
Onions planting calendar for USDA 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, needing roughly 245 frost-free days in zone 8b.
Not sure whether you're in 8a or 8b? 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
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