Plant Onions in Zone 6a
Seed-starting, transplant & harvest dates for USDA Zone 6a
Start indoors
Feb 9
Transplant
Apr 6
Harvest (~100d)
Jul 15
In Zone 6a, the average last spring frost is around April. Onions is a hardy crop, so give it a head start indoors about 10 weeks before that, then move it out after frost danger passes.
Last spring frost
Apr 20
First fall frost
Oct 13
Growing season
176 days
Full Onions grow guide → · All crops for Zone 6a →
Frequently asked questions
When should I start onions in Zone 6a?
Start onions seeds indoors around Feb 9 (Zone 6a).
Can I direct sow onions in Zone 6a?
Onions is best started indoors and transplanted in Zone 6a rather than direct sown.