Plant Onions in Zone 8b
Seed-starting, transplant & harvest dates for USDA Zone 8b
Start indoors
Jan 4
Transplant
Mar 1
Harvest (~100d)
Jun 9
In Zone 8b, the average last spring frost is around March. 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
Mar 15
First fall frost
Nov 15
Growing season
245 days
Full Onions grow guide → · All crops for Zone 8b →
Frequently asked questions
When should I start onions in Zone 8b?
Start onions seeds indoors around Jan 4 (Zone 8b).
Can I direct sow onions in Zone 8b?
Onions is best started indoors and transplanted in Zone 8b rather than direct sown.