Radish Stat Summary
Plant Spacing: 1-3" (25-76 mm)
Row Spacing: 8-15" (203-381 mm)
Planting Depth: 1/2" (12 mm)
Plants Per Person: 7
Soil Temperature: 45-80°F (7-27°C)
Days to Emergence: 4-11
Recommended Soil PH: 5.8-6.8
Earliest Outdoor Planting: Before Last Frost
Can direct seed outdoors
Prefers well-drained, loose soil, high in organic matter, free from stones, with pH 5.8 to 6.8 but can grow almost anywhere. Prepare soil by working compost into the top 2 to 3 inches. Sow seeds 1/2 inch deep about 1/2 inch apart in rows 8 to 15 inches apart. When seedlings emerge, thin to 2 inches apart in the row.
Radishes have a shallow root system so they require plenty of consistent moisture.
Harvesting and Storing Radish
Harvest round radishes when the roots are the size of a quarter or less than 1 inch in diameter. Young radishes have the best flavor, so pull them promptly.
Radish Insect and Disease Information
Flea beetles can be controlled with applications of Retenone-Pyrethrin.
Radish Yield Information
Because radishes mature quickly, radishes make a good inter-crop along with slower growing vegetable plants. For continuous harvest, make additional plantings every week or 2 until temperatures average in the mid 60s; you can once again begin planting in the fall.
Our New Book
A detailed look over 90 vegetables and herbs.
Guides for planting, growing, harvesting, and storing.
Now Available at
Amazon.com or as a PDF