Planting guide · zone 5a
When to plant radishes in zone 5a
In zone 5a, the average last spring frost is May 15 and the first fall frost is Oct 1. Here is radishes's whole year, counted from those dates.
Apr 10Direct sowSpring
Apr 20Succession sowing 2Spring
May 1Succession sowing 3Spring
May 11Succession sowing 4Spring
Aug 13Direct sowFall
Aug 23Succession sowing 2Fall
Sep 3Succession sowing 3Fall
Sep 13Succession sowing 4Fall
J
F
M
A
M
J
J
A
S
O
N
D
Soil & site
Any loose, average soil. Too much nitrogen grows lush tops and puny roots.
Seedling care
Direct sow only — radishes go seed to table faster than transplants would recover. Thin early.
Growing notes
Sow a short row every week or two instead of one big planting; they all mature at once otherwise.
Harvest
Pull promptly at size. Left too long they turn pithy and hot.