Growing Radishes in Zone 8b
A complete, zone-8b timeline for Radishes — when to start, transplant, and harvest, tuned to this zone's typical frost dates (Atlanta, Dallas, Portland OR).
Your planting timeline
- Direct sowonce soil warms, around March 21
- Harvestabout 22–35 days from transplant
Best varieties for zone 8b
Choose bolt-resistant salad types and lean on fall — sow French Breakfast and Sparkler in early spring and again in autumn, the best season here, and avoid the heat of summer.
Growing notes
Even, consistent moisture is the single biggest factor in good radishes. Keep the soil steadily damp — never bone-dry, never waterlogged — so the roots swell quickly and stay mild and crisp. Irregular watering, especially a drought followed by a heavy soaking, causes the roots to split or turn pithy and unpleasantly hot. In dry spring weather that usually means a thorough watering every two to three days; in cool, damp conditions rainfall may be enough. Water at the base in the morning to keep foliage dry, and mulch lightly between rows to hold moisture and even out the soil temperature.
Recommended supplies
Affiliate links — we may earn a small commission at no cost to you.
← Full Radishes growing guide · What else to plant in zone 8b this month →