When to Plant Onions in Zone 6
In USDA zone 6a, plant outdoors January 31 to May 21, and expect your first harvest around May 21. (6a shown here — see 6a and 6b dates separately below.)
Onions planting calendar for USDA Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Direct sow
Jan 31
Projected first harvest
May 21
Most onions mature in about 90 to 110 days depending on the variety, needing roughly 168 frost-free days in zone 6a.
Onions planting calendar for USDA Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Direct sow
Jan 26
Projected first harvest
May 16
Most onions mature in about 90 to 110 days depending on the variety, needing roughly 178 frost-free days in zone 6b.
Not sure whether you're in 6a or 6b? 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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