How to Grow Daikon (Long Japanese Type)
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Daikon (Long Japanese Type)
Raphanus sativus var. longipinnatus
vegetableDaikon is a large, mild Asian radish with elongated white roots that can grow 12-18 inches long. It has tender leaves suitable for cooking and a crisp, slightly sweet flavor that becomes milder with proper storage. This cool-season crop grows quickly and is versatile in Asian cuisines.
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Example Daikon (Long Japanese Type) timeline · Pittsburgh, PA (Zone 6b)
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Plant Daikon (Long Japanese Type)
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Daikon (Long Japanese Type)
Around Jun 6≈ 50 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Daikon (Long Japanese Type) dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; prefers cool weather for best quality
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Seedling
2-3 weeksSeeds germinate in 3-7 days. Tiny seedlings emerge with cotyledons and first true leaves appear within 1-2 weeks.
Thin seedlings to 6 inches apart when 2-3 true leaves develop. Keep soil consistently moist. Protect from slugs with row covers if needed.
Early Root Development
2-3 weeksTop growth reaches 4-6 inches tall. Roots begin swelling below soil surface, appearing as small white bumps.
Maintain even moisture. Apply mulch around plants to retain moisture and keep roots cool. Monitor for flea beetles.
Rapid Root Expansion
2-3 weeksFoliage becomes dense and bushy, 8-12 inches tall. Roots swell noticeably and may begin pushing slightly above soil surface.
Continue consistent watering. Hill soil gently around roots if they're exposed to prevent greening and bitterness. Ensure adequate spacing for air circulation.
Maturation
1-2 weeksRoots reach 12-18 inches long and 2-4 inches in diameter. Leaves are full but may show minor yellowing. Roots are firm and crisp.
Reduce watering slightly to concentrate flavor. Begin harvesting when roots reach desired size. Taste-test for preferred tenderness.
Harvest & Storage
Variable; harvest window 1-3 weeksRoots are full-sized and ready to harvest. At this point, quality remains stable for 1-2 weeks if left in ground in cool weather.
Harvest before hard freeze. Store in cool, humid conditions (32-40°F). Remove foliage before storage to prevent moisture loss.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Row covers over seedlings; insecticidal soap; neem oil; encourage beneficial predators
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Row covers; collars around base; crop rotation; diatomaceous earth
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and
Handpicking; slug traps with beer; copper tape barriers; encourage ground beetles
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Strong water spray; insecticidal soap; neem oil; companion planting with aromatic herbs
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Row covers; Bt (Bacillus thuringiensis); neem oil; encourage parasitic wasps
Uses
Fresh and cooked preparations
CulinarySlice thinly for salads, grate for slaws, or cube for stir-fries, soups, and braises. The mild, crisp texture pairs well with Asian seasonings. Greens are also edible when young and tender, used like mustard greens or mizuna. [source]
Pickling and fermentation
CulinaryDaikon is traditionally pickled in salt and vinegar (as in takuan in Japanese cuisine) or fermented into kimchi varieties. Long storage life makes it ideal for preservation. [source]
Digestive and respiratory support
MedicinalIn traditional Asian medicine, daikon is believed to support digestion and respiratory health due to its enzymes and compounds. Often recommended after heavy meals or as a natural detoxifier. [source]
Natural dye and cleaning
HouseholdDaikon leaves can be used to make natural dyes for fabrics. The roots have been used historically in natural cleaning preparations due to mild antimicrobial properties. [source]
Pollinator and pest benefit
WildlifeDaikon flowers (if allowed to bolt) attract bees and beneficial insects. The foliage can provide ground cover that benefits soil organisms and predatory insects. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when roots are 8-18 inches long and 2-4 inches in diameter, typically 50-70 days after planting. In mild climates, daikon can be left in the ground and harvested as needed through fall/winter. Gently loosen soil around roots and pull by the greens. For fall crops, plant in mid-to-late summer for autumn/winter harvest. Roots become more tender and sweet after light frost.
Fun Facts
- 🌱 Daikon means 'large root' in Japanese; it has been cultivated in Asia for over 2,000 years and is one of the most popular vegetables in Japanese, Korean, and Chinese cuisines.
- 🌱 Long daikon varieties can grow up to 18-24 inches in ideal conditions and weigh 3-5 pounds, yet remain tender and mild—unlike smaller Western radishes which become increasingly hot and peppery with size.
- 🌱 Daikon enzymes (amylase and protease) are believed to aid digestion, which is why it's traditionally served as a palate cleanser or digestive aid at the end of Asian meals.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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