Plant Radishes in Zone 4a
Seed-starting, transplant & harvest dates for USDA Zone 4a
Direct sow
Apr 12
Harvest (~28d)
May 10
In Zone 4a, 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 10
First fall frost
Sep 22
Growing season
135 days
Full Radishes grow guide → · All crops for Zone 4a →
Frequently asked questions
When should I start radishes in Zone 4a?
Direct sow outdoors around Apr 12.
Can I direct sow radishes in Zone 4a?
Yes, direct sow around Apr 12.