Plant Radishes in Zone 4b
Seed-starting, transplant & harvest dates for USDA Zone 4b
Direct sow
Apr 7
Harvest (~28d)
May 5
In Zone 4b, the average last spring frost is around May. Radishes 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 Radishes grow guide → · All crops for Zone 4b →
Frequently asked questions
When should I start radishes in Zone 4b?
Direct sow outdoors around Apr 7.
Can I direct sow radishes in Zone 4b?
Yes, direct sow around Apr 7.