Two halved Watermelon radishes showing vibrant pink centers and pale green skin on a dark marble surface.
Freshly harvested Watermelon radish roots with green leafy tops resting on dark garden soil.
Close-up of halved Watermelon radish showing a vibrant rose-pink interior and pale green skin.
Whole and halved Watermelon radish showing pale skin and a vibrant rose-pink interior on a dark stone surface.
Freshly harvested Watermelon radish roots with pale skin and green tops lined up on a dark marble surface.
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Watermelon - Radish Seeds

Open-Pollinated
Heirloom
$4.35
Choose size

🌱 Sow with Confidence—One-Year Seed Guarantee

Watermelon radish is a Chinese heirloom daikon type with pale green-white skin and a vivid rose center that looks like a slice of fruit when cut open. The roots are round to slightly oblong, crisp, and mild with a clean peppery finish.

Best grown in cool weather, this variety shines when sliced thin for salads, pickles, slaws, toast, and winter plates that need color. The outside is humble, but the inside is the whole story—a hidden pink heart beneath the soil.

Scientific name: Raphanus sativas
Life cycle: Annual
Days to maturity: 60 days from sowing
Root type: Daikon

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We stand behind every packet. Our seeds are untreated, germination-tested, true to variety, and covered for one year from purchase.

If seeds arrive damaged, fail to germinate under reasonable growing conditions, or do not grow true to type, contact us and we’ll make it right with a replacement, store credit, or refund.

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FAMILY OWNED

Hand packed in Pennsylvania by our family.

LAB TESTED

Third-party tested for reliable germination.

NON-GMO

Open-pollinated varieties for home gardens & seed saving.

UNTREATED SEED

Never coated with chemical seed treatments.

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Radish Growing Basics

Radishes have been cultivated for thousands of years, likely first in Asia before spreading through the Mediterranean, Europe, and beyond. Over time, growers developed small spring radishes, larger winter types, long daikons, leafy forms, and varieties grown for their edible seed pods.

Radishes are quick-growing, cool-season roots that fit easily into beds, containers, and spaces between slower crops. Direct sow into loose soil, thin promptly, and keep moisture steady. Spring radishes may be ready within a month, while larger winter and daikon types need more time and room.

Sow spring radishes several weeks before the average last frost, once the soil can be worked. Seeds germinate readily in soil around 40°F and emerge faster as it warms.

Make small sowings every 1–2 weeks while weather remains cool. Pause when sustained heat arrives, then resume in late summer for a fall crop.

Winter radishes and most daikons need a longer season. Sow them early enough to mature during cool fall weather, using the variety’s days to maturity and your first expected frost as guides.

Direct sow seeds ¼–½ inch deep. Space small spring radishes about 1–2 inches apart and larger winter or daikon types 4–6 inches apart, following the packet for unusually large varieties.

Radishes do not need to be started indoors. Their quick growth and developing taproots make direct sowing the better choice.

Keep the seedbed moist until seedlings emerge, usually within 3–10 days. Thin early because crowded plants often produce leafy tops and undersized roots.

Grow radishes in full sun during cool weather. Light afternoon shade can help as temperatures rise. Use loose, well-drained soil so roots can expand without obstruction.

Provide frequent, even moisture. Dry soil and interrupted growth can make roots woody, pithy, cracked, or strongly flavored.

Radishes need only moderate fertility. Excess nitrogen encourages leaves instead of roots. Weed carefully so nearby plants do not compete with the shallow roots.

Harvest spring radishes once the roots reach the expected size, often about 1 inch across. Check them frequently because the best harvest window may last only a few days in warm weather.

Winter radishes and daikons can remain in the ground longer and often develop better flavor in cool conditions. Harvest before the soil freezes or the roots become oversized and pithy.

Pull the entire plant, remove the tops, and refrigerate the roots promptly. Leaving the greens attached draws moisture from the root and shortens storage life.

Full Radish Growing Guide