Plant Onions in Zone 11b
Seed-starting, transplant & harvest dates for USDA Zone 11b
Direct sow
Feb 1
Harvest (~100d)
May 12
In Zone 11b, the average last spring frost is around year-round. Onions is a hardy crop, so sow it directly around the dates above.
Last spring frost
Frost-free
First fall frost
Frost-free
Growing season
365 days
Full Onions grow guide → · All crops for Zone 11b →
Frequently asked questions
When should I start onions in Zone 11b?
Direct sow outdoors around Feb 1.
Can I direct sow onions in Zone 11b?
Yes, direct sow around Feb 1.