Minowase Daikon Radish Seeds | Japanese White Radish

Grow Minowase daikon radish seeds for long white roots with crisp texture and a mild, lightly sweet flavor. This Japanese radish is useful fresh in salads, cooked in soups and stir-fries, or prepared for pickling. Give the roots deep, loose soil and cool growing weather for the best kitchen harvest.

What you are ordering

This listing is for seeds, not live plants or harvested radishes. Choose 500 seeds, 1 oz, 4 oz, 1 lb, or 5 lbs. One cart quantity purchases one selected pack. Weight-based packs are sold by weight; seed counts vary by lot.

Variety highlights

• Variety: Minowase daikon, also called Japanese white radish.
• Botanical name: Raphanus sativus.
• Root: long, white, and cylindrical, commonly reaching approximately 18 inches and potentially longer in favorable deep soil.
• Flavor: crisp, mild, and lightly sweet; heat and moisture stress can affect flavor and texture.
• Uses: fresh eating, cooking, pickling, and seasonal cover cropping.

When to plant

Late summer sowing for a cool fall harvest is generally the most reliable approach for long daikon roots. In mild climates, planting can extend into the cooler season. Spring sowing may be possible locally, but lengthening days and rising temperatures can trigger flowering before good roots form. Choose dates around your climate and expected frost rather than a fixed calendar.

Sowing and germination

Direct sow in full sun into deeply loosened, well-drained soil. Remove stones and break up clods so roots can develop with fewer obstructions. Avoid fresh manure or excessive nitrogen, which can encourage leafy growth and misshapen roots.

• Depth: cover seeds with approximately ¼–½ inch of fine soil.
• Spacing: thin to approximately 6 inches apart for kitchen-size roots, leaving enough room between rows for tending the crop.
• Germination: often 3–7 days in suitable conditions; keep the seedbed evenly moist.
• Succession: sow smaller batches about two weeks apart while seasonal conditions remain suitable.

Watering and ongoing care

Maintain steady moisture as roots develop. Drought stress and alternating dry and wet conditions can reduce root quality. Water deeply without waterlogging the soil, and keep weeds controlled while plants establish. Thin crowded seedlings early rather than leaving roots to compete.

Growing in containers

Use a very deep container with drainage holes and loose potting mix. A shallow planter will restrict this long-rooted variety; allow at least 18–24 inches of usable root depth where possible. Direct sow, thin generously, and check moisture often. Harvest younger roots if your container cannot accommodate their full length.

Harvesting and storage

Start checking roots around 45–60 days after sowing; larger roots or cooler conditions may require 8–12 weeks. Harvest according to root size and eating quality rather than waiting for maximum length. Shoulders around 1 inch or more across can indicate useful kitchen-size roots.

Loosen the soil carefully with a garden fork beside the root, then lift gently to avoid snapping it. Trim the tops, leaving approximately 1–2 inches of stem, and refrigerate promptly. Keep roots cool and humid without standing water, and inspect stored roots regularly. Storage life depends on maturity, handling, and conditions rather than a guaranteed number of weeks.

Cover crop and wildlife use

Daikon produces leafy growth and a substantial taproot that can help create channels in suitable soil. Decomposing plant material returns captured nutrients and organic matter to the soil; radish does not fix atmospheric nitrogen or replace a soil-fertility plan. It is not a substitute for mechanical soil preparation where a hard layer prevents root growth.

Deer may browse both foliage and roots, so protect kitchen crops where needed. For cover cropping, plan sowing density and termination around your local conditions and prevent unwanted seed production. Repeated mowing or grazing can limit root growth; regrowth and winter survival vary with conditions.