Radish 'Daikon 'Miyashige'
Raphanus sativus var. longipinnatus 'Miyashige'
A premium Japanese daikon variety prized for its exceptionally sweet, crisp flesh and smooth white skin. These impressively large roots can reach 14-18 inches long while maintaining perfect tenderness throughout. This variety is particularly valued for its ability to stay mild and juicy even when large, making it perfect for fresh eating and traditional Asian preparations.
Harvest
60-70d
Days to harvest
Sun
Full sun to partial shade
Zones
2–11
USDA hardiness
Height
0-3 feet
Planting Timeline
Showing dates for Radish 'Daikon 'Miyashige' in USDA Zone 7
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Radish 'Daikon 'Miyashige' · Zones 2–11
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 3 | March – April | May – June | May – June | July – October |
| Zone 4 | March – April | May – June | April – June | June – October |
| Zone 5 | February – March | April – May | April – May | June – November |
| Zone 6 | February – March | April – May | April – May | June – November |
| Zone 7 | February – March | April – May | March – May | May – November |
| Zone 8 | January – February | March – April | March – April | May – December |
| Zone 9 | January – January | February – March | February – March | April – December |
| Zone 10 | January – January | February – March | January – March | March – December |
Complete Growing Guide
Start by preparing deep, loose soil at least 18 inches down — compacted soil will cause forked or stunted roots that disappoint at harvest. Work in 2-3 inches of compost and ensure excellent drainage, as waterlogged soil leads to root rot. Remove every stone, clod, and debris piece you can find; even small obstacles will deform your beautiful straight roots.
Direct sow seeds only — daikon roots are notoriously sensitive to transplant shock and will bolt prematurely if disturbed. Plant seeds ½ inch deep and 2 inches apart in late summer, timing your planting so roots mature during cool fall weather. In zones 6-8, sow in mid to late August. Zones 9-10 can plant into September for winter harvest. Cool weather sweetens the roots and prevents the pithiness that develops in hot conditions.
Thin seedlings to 6 inches apart once they reach 3 inches tall — overcrowding produces spindly, weak roots. The thinned greens make excellent salad additions, so don't waste them. Side-dress with balanced fertilizer (10-10-10) three weeks after germination, focusing on phosphorus to encourage strong root development rather than excessive leaf growth.
Maintain consistent soil moisture throughout the growing period, providing about 1 inch weekly through deep, infrequent watering. Fluctuating moisture levels cause roots to crack or develop woody cores. Mulch around plants to retain moisture and suppress weeds, but keep mulch 2 inches away from stems to prevent pest issues.
Avoid high-nitrogen fertilizers after the first month, as they encourage leafy growth at the expense of root quality. The most common mistake is harvesting too early — while you can pull small roots, Miyashige's exceptional sweetness develops fully only in the final 2-3 weeks. Another frequent error is planting too early; hot weather makes roots bitter and tough.
Harvesting
Harvest Miyashige daikon 60-70 days after sowing, when roots reach 14-18 inches long and 2-3 inches in diameter at the shoulder. The best indicator is when the white root shoulder emerges 1-2 inches above soil level — this exposed portion should be bright white and feel firm when gently pressed. Avoid harvesting when soil is wet, as muddy conditions make extraction difficult and messy.
Harvest in cool morning temperatures when roots are fully hydrated and crisp. Loosen soil around each root with a spading fork, working 6 inches away from the root to avoid damage. Grasp the leaves close to the crown and pull straight up with steady pressure — properly grown Miyashige should lift cleanly without breaking. If resistance occurs, loosen more soil rather than forcing the pull. Immediately brush off excess soil but don't wash until ready to use, as wet roots deteriorate quickly in storage.
Storage & Preservation
Store freshly harvested Miyashige daikon in the refrigerator crisper drawer, wrapped loosely in perforated plastic bags to maintain humidity while allowing air circulation. Properly stored roots remain crisp and sweet for 2-3 weeks. Remove greens before storage, as they continue drawing moisture from roots.
For longer preservation, Miyashige excels in traditional fermentation — slice thin for quick kimchi or cut into chunks for slower lacto-fermentation. The variety's natural sweetness and firm texture make superior pickles using rice vinegar and mirin. Grated daikon freezes reasonably well for cooked applications, though texture softens considerably. Dehydrating thin slices creates excellent soup additions that rehydrate beautifully while retaining the variety's characteristic mild heat and sweetness.
History & Origin
Miyashige daikon represents generations of careful selection within Japan's rich radish breeding tradition, originating from the Miyagi Prefecture region of northern Honshu. This variety emerged during the mid-20th century as Japanese farmers sought to develop daikon cultivars that could maintain exceptional eating quality even when grown to impressive sizes — a significant achievement in radish breeding.
The variety name honors the Miyashige family lineage of seed savers who preserved and refined this particular strain through decades of careful selection for sweetness, texture, and storage qualities. Traditional Japanese agriculture emphasized developing regionally adapted varieties, and Miyashige was specifically selected for its ability to thrive in the cooler climate conditions of northern Japan while producing consistently mild, crisp roots.
Miyashige gained recognition among Western gardeners relatively recently, introduced through specialty seed companies focusing on authentic Japanese varieties during the growing interest in Asian vegetables in the 1990s. Its reputation for reliability and exceptional eating quality has made it a standard recommendation for gardeners seeking to grow restaurant-quality daikon at home.
Advantages
- +Exceptional sweetness that intensifies with size rather than becoming bitter like most radishes
- +Remarkably uniform, straight root development with minimal forking in proper soil conditions
- +Superior crisp texture maintained even in large 18-inch roots without developing woody cores
- +Extended harvest window — roots hold quality in ground for 2-3 weeks past maturity in cool weather
- +Excellent bolt resistance during unexpected warm spells that ruin other daikon varieties
- +Natural pest deterrent qualities reduce flea beetle damage compared to other brassicas
- +Outstanding storage life with proper handling maintains crispness for weeks
Considerations
- -Requires exceptionally deep, stone-free soil preparation or roots will fork and deform
- -Cannot be transplanted successfully — direct seeding only limits growing season flexibility
- -Long maturation period makes it unsuitable for quick succession plantings
- -Large root size requires significant garden space allocation — minimum 6-inch spacing
- -Sensitive to inconsistent watering which causes cracking and reduces storage life
Companion Plants
Plant Together
Carrots
Daikon's deep taproot breaks up soil for shallow carrot roots, while carrots don't compete for space
Lettuce
Fast-growing lettuce can be harvested before daikon needs full space, maximizing garden efficiency
Spinach
Cool-season companion that can be interplanted and harvested before daikon matures
Chives
Repels aphids and flea beetles that commonly attack brassicas
Marigolds
Deters nematodes and attracts beneficial insects that prey on brassica pests
Dill
Attracts beneficial wasps that parasitize cabbage worms and other brassica pests
Nasturtiums
Acts as trap crop for flea beetles and aphids, protecting daikon from these pests
Peas
Fixes nitrogen in soil which benefits heavy-feeding daikon radishes
Keep Apart
Broccoli
Competes for same nutrients and attracts identical pests like cabbage worms and flea beetles
Fennel
Produces allelopathic compounds that inhibit growth of brassicas including radishes
Turnips
Same family crop that depletes identical soil nutrients and shares common diseases like clubroot
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #169276)
Pests & Disease Resistance
Resistance
Good general disease resistance, less prone to clubroot than other brassicas
Common Pests
Flea beetles, cabbage root maggots, aphids
Diseases
Clubroot, black root, downy mildew, white rust