150+ White Radish Seeds – White Icicle & Japanese Daikon Seeds

White Radish Seeds for Planting – White Icicle & Japanese Daikon Seeds (Raphanus sativus) include two distinctive white radish varieties with different root sizes, shapes, and harvest times. White Icicle Radish produces slender, tapered white roots approximately 4–6 inches long with crisp flesh and a mild, pleasantly peppery flavor. Japanese Daikon Radish produces much larger, long white roots with a crisp, juicy texture and a milder, slightly sweet flavor. Daikon is especially popular in Japanese and other Asian cuisines.

The main difference between these two varieties is root size and maturity. White Icicle is a fast-growing garden radish that can be harvested in about 25–30 days, making it excellent for salads, fresh snacking, garnishes, and pickling. Japanese Daikon develops much larger roots and requires a longer growing period, making it ideal for pickling, kimchi-style dishes, soups, stir-fries, roasting, and fresh slicing.

Planting Season

Best planted in: Early Spring & Late Summer to Early Fall (Cool-Season Crop)

Direct sow seeds outdoors as soon as the soil can be worked in spring. For a fall harvest, sow again in late summer. Daikon varieties perform particularly well when planted in late summer and allowed to mature during cool fall weather.

Radishes grow best in cool temperatures around 50–75°F (10–24°C). Prolonged hot weather can cause roots to become woody, overly spicy, or encourage plants to bolt.

How to Grow White Radish Seeds

Direct sow seeds in loose, fertile, well-drained soil. Radishes are normally grown directly from seed rather than transplanted.

Sow seeds approximately ¼–½ inch deep.

Choose a location receiving at least 6 hours of direct sunlight daily.

Keep the soil consistently moist during germination but not waterlogged.

Seeds typically germinate within approximately 3–10 days under favorable conditions.

Thin White Icicle seedlings to approximately 2 inches apart. Allow Japanese Daikon approximately 4–6 inches between plants because its roots grow considerably larger.

Space rows approximately 12–18 inches apart.

Loosen the soil deeply and remove rocks or hard clumps. Deep, sandy, well-drained soil is especially important for producing straight, well-shaped Daikon roots.

Mix finished compost into the soil before planting, but avoid excessive nitrogen or fresh manure.

Both varieties can be grown in raised beds. For containers, choose pots at least 8–10 inches deep for White Icicle and approximately 12–18 inches deep for Japanese Daikon.

How to Care for White Radish Plants

Water consistently so the soil remains evenly moist. Rapid, stress-free growth produces the most tender and flavorful roots.

Apply a light layer of mulch to conserve moisture, suppress weeds, and keep the soil cool.

Avoid excessive nitrogen fertilizer, which may encourage leafy growth instead of strong root development.

Monitor for common pests such as flea beetles, aphids, and root maggots. Crop rotation and lightweight row covers can help reduce pest problems.

White Icicle Radishes generally mature in approximately 25–30 days. Harvest when roots are about 4–6 inches long, firm, crisp, and bright white.

Japanese Daikon Radishes generally require approximately 50–70 days, depending on the specific strain and growing conditions. Harvest when the roots have reached their expected mature size and remain firm and crisp.

Do not leave mature roots in warm soil for too long, as they may become woody or overly strong in flavor.

Loosen the surrounding soil before lifting large Daikon roots to prevent them from breaking.

Remove the leafy tops after harvest and refrigerate the roots. Large storage-type radishes such as Daikon can remain fresh for considerably longer than small spring radishes under cool, humid storage conditions.

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