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Radish Seeds, Japanese Minowase Daikon
Description
(Raphanus sativus). A popular old Japanese favorite, valued for its culinary versatility and refreshing crunch. The giant white roots grow to 24 inches long and 3 inches wide. Sweet and very crisp, this radish is a delight pickled, stir-fried, steamed, or raw.
- 40-50 days to maturity
- Full sun
- Sprouts in 3-6 days
- Ideal Temperature: 50-75 F
- Seed Depth: 1/4"
- Plant Spacing: 4-6"
- Frost Hardy: Yes
Growing Tips, Tricks and FAQs
Growing Tips
Plant Japanese Minowase Daikon radishes in full sun or partial shade in warmer climates, and apply a balanced fertilizer at planting. The soil should be loose, well-draining, and enriched with compost. Monitor for pests like flea beetles and use row covers if necessary.
When to Grow
Japanese Minowase Daikon radishes are cool-season crops, best planted in early spring. You can start sowing seeds as soon as the soil can be worked, about 4 weeks before the last frost date. These radishes prefer cool weather, ideally between 50-75 F, and may become overly pungent if exposed to prolonged warm temperatures.
How to Sow and Plant
Sow the seeds directly in the garden about 1/4 inch deep and space them 1-2 inches apart in rows that are 12-18 inches apart. After germination, thin the seedlings to about 4-6 inches apart to give each plant enough space to develop its large roots. Daikon radishes grow best in well-drained, fertile soil with a pH of 5.8 to 7.0.
How to Grow
Ensure the soil remains evenly moist but not waterlogged to promote healthy root growth and prevent the radishes from becoming woody or overly spicy. Mulching around the plants helps retain soil moisture, suppress weeds, and regulate soil temperature. Fertilize the soil with a balanced fertilizer at planting time to support steady growth. Daikon radishes need full sun but can tolerate partial shade, especially in warmer climates.
How to Save
- Radishes are insect-pollinated, so you’ll need to isolate varieties by up to 1⁄2 mile or stagger plantings to avoid flowering at the same time.
- Staggering can be easy because of the radish’s quick maturity.
- Allow flower stalks to shoot up and seed pods to dry on the plant before picking pods and opening by hand to remove the seeds.
- Seeds will remain viable for up to 5 years when stored in an airtight container.
FAQ
How do I know when my Japanese Minowase Daikon radishes are ready to harvest?
They are typically ready to harvest 40-50 days after planting when the roots are up to 24 inches long and about 3 inches in diameter. The tops of the roots often start to protrude from the soil, indicating they are ready for harvest.
What are common pests and diseases that affect Japanese Minowase Daikon radishes, and how can they be managed?
These include flea beetles and root maggots. Using row covers can help prevent these pests. Practice crop rotation to avoid soil-borne diseases, and ensure good spacing between plants to promote air circulation, which reduces the risk of fungal infections.
Can Japanese Minowase Daikon radishes be grown in containers?
Yes, these radishes can be grown in containers, provided the container is deep enough to accommodate their long roots—at least 24 inches deep. Ensure the container has good drainage and is filled with a loose, well-draining soil mix, and water regularly.
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