How to Grow Radishes in 25 Days (Day-by-Day)
Radishes sprout in 4–6 days and mature in 25. Plant 1/4 inch deep, thin to 2 inches, keep soil moist, and harvest when the root pokes out of the soil.
Radishes are the fastest vegetable. They’re also the best confidence-builder.
Day-by-Day
| Day | What’s Happening |
|---|---|
| 0 | Sow 1/4 inch deep, 1 inch apart |
| 4-6 | Sprouts appear |
| 10 | Thin to 2 inches |
| 20 | Roots begin to swell |
| 25 | Ready to harvest |
The 3 Rules
- Cool weather. Above 75°F, radishes bolt.
- Consistent moisture. Dry soil = woody, pithy roots.
- Thin to 2 inches. Crowded radishes = all leaf, no root.
Harvest
When: Root pokes out of soil, 1 inch wide. How: Water first, then pull straight up.
Common Questions
Why are my radishes all leaf? Too crowded, too much nitrogen, or too hot. See: Why Your Radishes Are All Leaf.
Can I grow them in summer? No. They bolt.
How long do they store? 1-2 weeks in fridge.
Are the leaves edible? Yes. Peppery. Use in salads.
Can I grow them in containers? Yes. 6-inch deep pot.
Can I succession plant? Yes. Every 10 days for continuous harvest.