How to Grow Radish Microgreens
Raphanus sativus
Radish microgreens offer a quick harvest of peppery greens perfect for adding flavor to salads and sandwiches. Gardeners value them for their rapid growth cycle and ability to thrive in cool conditions where other crops might struggle.
📷 Wikimedia CommonsStarting Radish Microgreens: indoors or direct sow?
🌾 Sow directly in the garden — Radish Microgreens is not usually started indoors.
Direct sow seeds into your final growing container or tray; do not transplant seedlings as they develop rapidly and prefer minimal disturbance.
Soil, care & harvest
Prepare your container with loose, sterile soil adjusted to a pH between 6.0 and 7.0. As a cool-season crop, sow seeds indoors or directly outside 2-6 weeks before the last frost date. Press seeds gently into the surface without covering them deeply, as they germinate quickly within 2 to 3 days.
Maintain consistent moisture by misting regularly rather than pouring water heavily. Ensure you provide moderate to bright light or grow lights for 12-14 hours daily to prevent leggy growth. Avoid overwatering, as saturated soil can lead to root rot issues common in these fast-growing greens.
Watch for flea beetles and rare aphids; their rapid growth cycle usually prevents significant damage. Prevent damping off by ensuring good air circulation and avoiding waterlogged trays. Harvest your microgreens after approximately 30 days when the leaves are fully developed, cutting them just above the soil line with clean scissors.
When to Plant Radish Microgreens
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | January – December | — | January – December |
| Zone 2 | January – December | — | January – December |
| Zone 3 | January – December | — | January – December |
| Zone 4 | January – December | — | January – December |
| Zone 5 | January – December | — | January – December |
| Zone 6 | January – December | — | January – December |
| Zone 7 | January – December | — | January – December |
| Zone 8 | January – December | — | January – December |
| Zone 9 | January – December | — | January – December |
| Zone 10 | January – December | — | January – December |
| Zone 11 | January – December | — | January – December |
| Zone 12 | January – December | — | January – December |
| Zone 13 | January – December | — | January – December |
Companion Plants for Radish Microgreens
✓ Good companions
Both are fast-growing brassicas with similar care needs and harvest timing
Natural pest deterrent that repels aphids and other small insects
Attracts beneficial insects and has similar quick-growing microgreen characteristics
Fellow brassica with compatible growing requirements and pest resistance
Compatible growing conditions and harvesting timeline, efficient use of growing space
Same plant family with identical growing conditions and natural pest deterrent properties
Complementary growth habits and both thrive in cool, moist conditions
Similar water and light requirements, can be grown together in succession plantings
✗ Keep away from
Competition between brassica family members can lead to stunted growth and nutrient depletion
Same family plants compete for nutrients and may attract concentrated pest populations
Allelopathic properties inhibit germination and growth of most other plants including radishes
Nutrition Facts
Per 100g serving (USDA FoodData Central)
