Plant Spinach in Zone 4b
Seed-starting, transplant & harvest dates for USDA Zone 4b
Direct sow
Mar 31
Harvest (~45d)
May 15
In Zone 4b, the average last spring frost is around May. Spinach is a hardy crop, so sow it directly around the dates above.
Last spring frost
May 5
First fall frost
Sep 28
Growing season
146 days
Full Spinach grow guide → · All crops for Zone 4b →
Frequently asked questions
When should I start spinach in Zone 4b?
Direct sow outdoors around Mar 31.
Can I direct sow spinach in Zone 4b?
Yes, direct sow around Mar 31.