How to Grow Daikon Radish Sakurajima
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Daikon Radish Sakurajima
Raphanus sativus var. longipinnatus
vegetableSakurajima is a giant Japanese daikon radish variety known for producing massive, globe-shaped roots that can weigh 10-50 pounds at maturity. This heirloom cultivar has tender, mild white flesh and smooth skin, making it excellent for fresh eating, pickling, and cooking. It thrives in cool weather and is a staple in Asian cuisine.
When should you plant Daikon Radish Sakurajima in your zone?
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Example Daikon Radish Sakurajima timeline · Pittsburgh, PA (Zone 6b)
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Plant Daikon Radish Sakurajima
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 Radish Sakurajima
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Daikon Radish Sakurajima dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; best growth in zones 4-8 with cool autumn temperatures
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Get my Daikon Radish Sakurajima timeline →Growth Stages
Germination
3-7 daysSeeds sprout within 3-5 days with fine green cotyledons emerging from soil
Keep soil consistently moist; thin seedlings when 1-2 inches tall to 1 per pot or wider spacing
Seedling/Leaf Development
2-3 weeksTrue leaves emerge; plant develops feathery green foliage with lobed, textured leaves
Thin to 8-12 inches apart; water regularly; begin fertilizing with balanced NPK every 2-3 weeks
Root Expansion
4-6 weeksRoot begins to swell visibly at soil surface; foliage becomes denser and more robust; white shoulder of radish appears above ground
Maintain consistent watering; mulch around base to retain moisture and keep root cool; weed carefully to avoid root damage; continue fertilizing
Bulking/Maturation
3-4 weeksRoot swells dramatically to giant size (10-50 lbs possible); skin becomes smooth and white; foliage reaches full size
Reduce nitrogen fertilizer to avoid excessive leaf growth; maintain even moisture; avoid overwatering to prevent splitting; monitor for pests and disease
Harvest
Harvest at peak; can store in ground for weeks in cool weatherRoot has reached desired size; skin is firm and white; root crowns may protrude above soil surface
Loosen soil around radish before pulling; harvest before severe freezes; can be left in ground in cool climates for extended harvest
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers on seedlings; spray with neem oil or spinosad; dust with diatomaceous earth
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Apply parasitic nematodes to soil; use row covers; practice crop rotation; remove affected plants
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Use Bt (Bacillus thuringiensis); employ row covers; remove infected foliage; plant resistant varieties
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Hand-pick; use copper tape; create barriers; apply slug pellets or beer traps
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Spray with strong water jet; use insecticidal soap; introduce ladybugs; apply neem oil
Uses
Raw & Pickled
CulinarySakurajima radish is prized for its mild, tender flesh perfect for fresh slicing in salads and as a crunchy snack. Traditional Japanese pickles (takuan) and Korean kimchi use daikon extensively for its crisp texture and ability to absorb flavors. [source]
Cooking & Broths
CulinaryThe mild flavor becomes sweet when cooked; excellent in stir-fries, soups, stews, and braised dishes. Japanese cuisine features daikon in oden, miso soup, and simmered preparations where it absorbs surrounding flavors. [source]
Digestive Aid
MedicinalDaikon radish contains enzymes that aid digestion of fats and carbohydrates, and is traditionally used in Asian medicine to support gastrointestinal health. The glucosinolates in raw daikon may offer anti-inflammatory benefits. [source]
Greens & Root Utilization
HouseholdThe leafy tops are edible and nutritious, suitable for stir-frying or adding to soups much like mustard greens. Both root and greens reduce waste and maximize yield from a single plant. [source]
Garden Biodiversity
WildlifeDaikon flowers (if allowed to bolt) attract pollinators and beneficial insects. The foliage provides habitat for predatory insects that help control garden pests. [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 reach desired size (typically 6-12 inches in diameter, but can grow much larger). Gently loosen soil around the root with a garden fork before pulling to avoid breakage. Sakurajima matures primarily in fall when temperatures cool. In cooler zones, plant in mid-summer (July-August) for autumn harvest. Can be left in ground in zones 3-7 for extended storage through winter with mulch protection. Check maturity by gently exposing the shoulder of the root at soil level. Harvest before severe freezes, or mulch heavily to preserve in-ground storage.
Fun Facts
- 🌱 Sakurajima daikon is named after the volcanic island of Sakurajima in Japan and is a cultural agricultural treasure; some specimens have been recorded weighing over 50 pounds, with the world record exceeding 68 pounds.
- 🌱 Daikon radish is one of the most consumed vegetables in Japan and East Asia, featuring prominently in traditional New Year celebrations and ceremonial dishes for centuries.
- 🌱 Unlike small European radishes, daikon becomes milder and sweeter the larger it grows, and stores exceptionally well in cool conditions for months, providing a fresh winter vegetable long after harvest.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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