Cool-season crop
Radish Planting Windows for Fast Spring and Fall Crops
Use local frost references for radish succession sowing, with seed depth, thinning, maturity, heat, and harvest-size guidance.
Reviewed by Garden By ZIP Editorial Review ·
- Spacing
- 1–4 in
- Seed depth
- 0.5–0.5 in
- Typical maturity
- 22–35 days
Quick answer
Direct-sow radishes about 4–2 weeks before the last spring freeze reference and again about 4–6 weeks before the first fall freeze reference. Use the planting calendar to place those ranges locally.
Planting methods
Direct sowing is simple and fast. Small repeat sowings are more useful than one dense row when a steady harvest is the goal.
Spacing, depth, and maturity
Sow about 1/2 inch deep and thin to 1–4 inches according to root type. Spring radishes often mature in only 22–35 days.
Worked local-calendar example
If the last spring freeze reference is April 19, an early range spans late March into early April. With an October 23 first fall freeze reference, fall sowing lands in September. The example is not a national fixed date.
Common mistakes
- Leaving crowded seedlings unthinned.
- Letting mature roots sit until they become pithy.
- Sowing through high heat and expecting spring quality.
Limitations
Root type, temperature, moisture, flea beetles, and harvest size influence the result. Check the selected variety packet.