How to Grow Radish (2026)
Fastest crop; successive sowings spring/fall.
Quick answer: Radish is a cool-season crop for zones 3–11 in part sun. Plant 2–4 weeks before the last frost or in fall, space 2″ apart, and expect harvest in about 28 days.
Build your Radish planting card
Pick your state for indoor-start, sow/transplant, and harvest dates you can print.
In Alabama (zone 7–9, last frost ≈ Mar 15, first frost ≈ Nov 15, 245-day season), your Radish plan:
Fastest crop; successive sowings spring/fall. Suits USDA zones 3–11. Dates are typical; confirm with your county extension and the 10-day forecast.
Growing tips
- Spacing: 2 inches between plants keeps air flowing and limits disease.
- Depth: sow seeds about 0.5″ deep (or set transplants at the same soil line).
- Sun: Part shade tolerated — protect from hot afternoon sun.
- Season: Tolerates light frost; best in cool weather, sow in spring and again in fall.
Spacing & planting FAQ
Common radish problems
Symptoms, likely causes, fixes and prevention — each page is printable.
More cool-season crops
Spacing, depth, and days-to-harvest are typical values from university extension guides. Planting dates are computed from typical USDA/extension freeze dates (USDA Plant Hardiness Zone Map (2023) + state cooperative extension typical freeze dates); confirm locally before acting.