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Easily planted from seed, organic gardeners enjoy growing radishes for their crisp, peppery roots.

RadishSunlight: Full sun to partial shade
Maturity: 20-60 days
Height: 6 to 18 inches
Spacing: 1 to 2 inches apart, 8 to 18 inches between rows

The perfect cool-weather crop for impatient young gardeners! Radishes can be grown, harvested and eaten in as little as three weeks. These potent root vegetables are packed with minerals, dietary fiber, and vitamins C and B6. They are members of the Brassicaceae family, which makes them cousins to cabbage and broccoli.

Fun Fact: This pungent superfood was given as wages to the ancient Egyptians who built the pyramids.

All heirloom radish seeds offered by Planet Natural are non-treated, non-GMO and NOT purchased from Monsanto-owned Seminis. Planting instructions are included with each packet and shipping is FREE!



Radish Seeds

Peppery or spicy, radishes are everyone’s favorite fresh salad addition.

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Quick Guide

  • Direct seed this short-season, cool-weather crop in spring or fall
  • Plant in loose soil in full sun to part shade
  • Harvest when roots grow to 1 in. across
  • Pests and diseases include flea beetles, cabbage worms, root maggots, clubroot and fusarium wilt

Site Preparation

Radishes grow best in the spring and autumn and will tolerate light winter frosts. They require full to partial sun, ample water and rich, fast-draining soil. Loosen soil to a depth of 8 inches and work in 10 pounds of organic compost per 100 square feet.

Add some kelp meal to your vegetable garden. It’s loaded with micronutrients and is especially good for supplying trace minerals to crops that will be consumed.

How to Plant

Sow seeds directly in the garden, 1/2 inch deep, as soon as you can work the soil. Plant weekly to spread out the harvest over weeks, not days. Space rows 8-18 inches apart, planting eight to ten seeds per foot. Thin to one plant every 2 inches.

Keep garden areas cool and well mulched with compost or aged animal manure. High temperatures and drought make this vegetable tough, strong tasting and prone to insect problems (see Growing the Perfect Radish).


Pull radishes when they are of usable size (usually when they reach up to 1 inch in diameter) and relatively young. Check often, as radishes can turn from tasty to terrible (pithy and spongy) in a short period of time. Spring radishes mature in 3-5 weeks. Winter types mature in 55-60 days.

Insects and Diseases

Radishes are related to cabbage and suffer from many of the same problems. Since leaves are not harvested, more insect damage can be tolerated on foliage than other vegetable plants. If holes or tunnels are found in the bulbs, suspect root maggots and treat using proven, organic techniques.

Seed Saving Instructions

Radishes will cross-pollinate and must be isolated by 1/2 mile or planted in insect-proof cages covered with screen. Radish seed stalks will grow up to 3 feet tall. Always discard the early bolting plants, since they are not the best plants to save for seed. The seed stalk is harvested when the stalk and pods are dry. Seeds can then be separated by hand.

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