When to Plant Radishes in Zone 4
In USDA zone 4a, plant outdoors May 1 to June 30, and expect your first harvest around June 30. Zone 4 also has a fall planting window opening around July 26. (4a shown here — see 4a and 4b dates separately below.)
Radishes planting calendar for USDA Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
spring planting
Direct sow
May 1
Projected first harvest
Jun 30
fall planting
Direct sow
Jul 26
Projected first harvest
Sep 24
spring planting
fall planting
Most radishes mature in about 24 to 60 days depending on the variety, needing roughly 128 frost-free days in zone 4a.
Radishes planting calendar for USDA Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
spring planting
Direct sow
Apr 26
Projected first harvest
Jun 25
fall planting
Direct sow
Jul 31
Projected first harvest
Sep 29
spring planting
fall planting
Most radishes mature in about 24 to 60 days depending on the variety, needing roughly 138 frost-free days in zone 4b.
Not sure whether you're in 4a or 4b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
6 varieties of radishes in the HomeSown library. Tap any for its full grow guide.
Common problems with radishes
What to watch for, with identification and treatment for each
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