When to Plant Radish in Zone 10
Raphanus sativus
Last updated: Apr 29, 2026 · Sources: USDA, NOAA, Cooperative ExtensionAction Plan
Plant Radish in Zone 10
- Direct sow: Feb 10 — after last frost (Feb 10)
- First harvest: Mar 9 (22–35 days after planting)
⚠️ Don't plant before last frost (Feb 10) — cold snaps kill young transplants.
Last frost
Feb 10
First frost
Dec 10
Growing season
303 days
Quick Facts
Sunlight
☀️ Full Sun
Water Needs
💧💧 Moderate
Spacing
3 inches apart
Planting Depth
0.5 inch
Min Soil Temp
40°F
Germination
3–7 days
Days to Maturity
22–35 days
Frost Tolerance
Moderate frost tolerance
Soil pH
6.0–7.0
Difficulty
Easy
What you'll need — Zone 10
🛒 Radish — Seeds & Supplies
- 🌱 Radish Seeds Variety Pack
- 🌱 Garden Row Markers
- 🌱 Seed Tape for Easy Spacing
Search for these at your local garden center or nursery.
Growing Tips
- Radishes are ready in as little as 22 days — perfect for impatient gardeners.
- Sow every 1–2 weeks for continuous harvest through spring and fall.
- Don't over-fertilize — too much nitrogen gives you tops, not roots.
- Use radishes as row markers for slow-germinating crops like carrots.
- Harvest promptly — overripe radishes become pithy and hot.
Common Mistakes
- Planting in summer heat — radishes bolt immediately above 75°F.
- Not thinning to 2 inches — crowding causes small, misshapen roots.
- Leaving in the ground too long — they become hollow and peppery.
- Planting too deep — radishes need only 0.5 inch depth.
Companion Planting
Companion planting improves growth, deters pests, and makes better use of garden space.
✓ Good Companions
✗ Avoid Nearby
Hyssop
Radish Schedule — All Zones
| Zone | Start Indoors | Transplant | Direct Sow | Harvest Start | Harvest End |
|---|---|---|---|---|---|
| Zone 2 | — | — | May 25 | Jun 21 | Aug 3 |
| Zone 3 | — | — | May 15 | Jun 11 | Jul 24 |
| Zone 4 | — | — | May 10 | Jun 6 | Jul 19 |
| Zone 5 | — | — | Apr 30 | May 27 | Jul 9 |
| Zone 6 | — | — | Apr 15 | May 12 | Jun 24 |
| Zone 7 | — | — | Apr 5 | May 2 | Jun 14 |
| Zone 8 | — | — | Mar 20 | Apr 16 | May 29 |
| Zone 9 | — | — | Feb 28 | Mar 27 | May 9 |
| Zone 10 | — | — | Feb 10 | Mar 9 | Apr 21 |
| Zone 11 | — | — | Jan 15 | Feb 11 | Mar 26 |
Other Zones for Radish
Zone 2 · Zone 3 · Zone 4 · Zone 5 · Zone 6 · Zone 7 · Zone 8 · Zone 9 · Zone 11
📚 Data Sources
Frost dates: NOAA Climate Normals 1991–2020, National Centers for Environmental Information.Hardiness zones: USDA Plant Hardiness Zone Map, Agricultural Research Service.
Growing requirements: Cooperative Extension Services — NC State, Penn State, University of Florida IFAS.
Companion planting: Cornell University Cooperative Extension.
Data compiled from public agricultural sources. Always verify with your local extension office for micro-climate adjustments.