Radishes can tolerate frost, so sow directly outdoors 4-6 weeks before the last spring frost date; or in late summer for a fall harvest. Plant seeds 1/4 inch deep in a sunny spot, without shade, in rich, well tilled soil. If soil is clay-like mix in some sand and fertilizer. Distribute seeds evenly about 1 inch apart in rows 6-12 inches apart. Thin radishes 1 every 2-3 inches when plants are a week old. Consistent, even moisture is key with radishes. Keep the soil moist with frequent, shallow waterings.
Radishes are Fast Growers: When you think they're ready to harvest, pull one out to test it. The bulbs should be about 3/4 to 1 inch in diameter.
Harvest All Season Long: Plant new seed rows every 10 days or so -- while the weather is still cool -- for a continuous harvest during the growing season.
Wit & Wisdom: Practice three-year crop rotation. In other words, only plant radishes in the same spot every third year. Read The Old Farmer's Almanac Radish Growing Guide!
The Old Farmer's Almanac Organic Radish Seeds (Heirloom Cherry Belle)
|Country of Origin||United States|
|Seed Type||Organic, Non-GMO, Heirloom|
|Hardiness Zone||USDA 3-12|
|Seed Count||Approximately 500 Seeds|
|When to Plant||Early Spring, Early Fall|
|Packed for Year||2021|
|Scientific (Latin) Name||Raphanus Sativa|
|Microgreen Color||No Data|
|Microgreen Flavor||No Data|
|Blackout Time||No Data|
|Planting Depth||1/4 Inch|
|Sample Seeding Rate||No Data|
|Plant Spacing||2-3 Inches|
|Row Spacing||6-12 Inches|
|Time to Germination||7-14 Days|
|Time to Maturity / Harvest||20-30 Days|
|Growth Habit||No Data|
|Plant Height||No Data|
|Plant Spread||No Data|
|Fruit / Vegetable Size||1 Inch Bulbs|
|Support Required||No Data|