Planting Radish
Radish is a cool season vegetable in the Brassicaceae family. Getting the timing right is the difference between a strong stand and a disappointing one, so the windows below are given relative to your own last spring frost and first fall frost rather than a generic calendar date. Look up your local frost dates and count back or forward from there.
You can sow Radish directly into the garden 2–4 weeks before your last frost.
For a fall crop, sow 4–6 weeks before your first fall frost so plants mature as the weather cools.
Spacing and Planting Depth
Give Radish room to mature. The figures below come from verified extension and seed-supplier data for typical varieties.
| Spacing in row | 2 inches |
|---|---|
| Row spacing | 6 inches |
| Plants per sq ft | 12 |
| Planting depth | 0.5 inches |
| Sun requirement | Full sun |
Days to Maturity
Radish reaches maturity in 22–30 days from sowing. Once ready, plants continue producing for approximately 10 days.
For a continuous harvest, sow a new batch every 10 days. Use the succession planting scheduler →
Radish is ready to harvest after about 26 days. Picking regularly over the roughly 10-day harvest window keeps plants productive and encourages a longer pick. Harvest before summer heat or, for fall crops, before a hard freeze, to keep quality high.
Conditions and Care
As a cool-season vegetable, Radish does its best growing in the cooler weather of spring and fall and tends to bolt or turn bitter in summer heat. It is frost hardy and can shrug off light freezes, so it can stay in the ground later into the season than tender crops.
Radish needs full sun — give it at least six hours of direct light a day for the best growth and flavor. Sow seed about 0.5 inches deep, then keep the soil evenly moist until seedlings establish.
Radish belongs to the Brassicaceae family; rotating where you grow members of this family each year helps limit the build-up of soil-borne pests and disease. Because it matures relatively quickly, Radish rewards succession sowing: small, repeated plantings keep a steady supply coming rather than one short glut.
Companion Plants
Pairing Radish with the right neighbors can improve growth and deter pests; a few combinations are best avoided.
Grows well with: Lettuce (Loose-leaf), Carrots, Cucumber, Shelling Peas