When to Plant Radishes for Spring, Summer, and Fall Gardens
Radishes are one of the fastest-growing vegetables, making them a rewarding choice for multiple plantings throughout the year. Knowing when to plant ensures tender roots and crisp flavor. Here’s a seasonal guide to get the most from your radish crops.
Planting Radishes in Spring
Radishes thrive in cool soil. For an early spring harvest, sow seeds 4–6 weeks before your last expected frost. In mild climates, you can plant as soon as the soil is workable. Germination is quick—often within 3–5 days—and roots are ready to harvest in 3–4 weeks.
Tips:
- Direct-sow seeds ½ inch deep and 1 inch apart.
- Keep soil moist for even germination.
- Thin seedlings to avoid crowding and misshapen roots.
Planting Radishes in Summer
Summer planting is possible if you choose heat-tolerant varieties like ‘French Breakfast’ or ‘Icicle’. In hot regions, plant in partial shade and keep soil evenly moist to reduce stress and prevent bolting. Avoid mid-summer sowings in extremely hot climates—opt for early summer or late summer planting instead.
Planting Radishes in Fall
Fall radishes often have the best flavor due to the cool temperatures. Sow seeds 4–6 weeks before your first expected frost. Larger winter radishes, like ‘Daikon’ or ‘Black Spanish’, should be planted in late summer so they mature in the crisp autumn air.
Tips:
- Use row covers to protect seedlings from late-summer pests.
- Mulch to keep soil cool and retain moisture.
- Harvest promptly for the best flavor and texture.
My Experience
I’ve grown radishes in all three seasons for decades, experimenting with varieties from spicy globe types to mild, crisp Asian daikons. Timing plantings to match the radish’s preference for cooler soil has consistently produced the sweetest, crunchiest roots in my garden beds.
