Crop guide · Raphanus sativus
Radishes
Dates below are counted from the average last spring frost or the average first fall frost. Enter a ZIP in the calendar for NOAA 1991–2020 station averages, or pick a zone and use the zone table.
When to plant
Direct sow5 weeks before the average last spring frost.
SuccessionRepeat every 1.5 weeks, 3 more times.
Direct sow7 weeks before the average first fall frost.
SuccessionRepeat every 1.5 weeks, 3 more times.
Soil and site
Any loose, average soil. Too much nitrogen grows lush tops and puny roots.
Seedlings
Direct sow only — radishes go seed to table faster than transplants would recover. Thin early.
In the garden
Sow a short row every week or two instead of one big planting; they all mature at once otherwise.
Picking
Pull promptly at size. Left too long they turn pithy and hot.
Gear placeholders
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Dates by zone
These pages turn the same frost offsets into calendar dates for each zone the calendar covers.