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Komatsuna Seeds, Spinach Mustard "Old Tokyo"
Description
(Brassica rapa var. perviridis). The old and traditional Komatsuna strain from Tokyo, Japan, makes a perfect spinach substitute. It might be hard to believe that Komatsuna is actually a mustard! The leaves combine the best qualities of spinach and mustard, with a mild and sweet flavor reminiscent of spinach but with the powerful nutrition of a mustard! The leaves are very high in vitamins A and C, and it is a good source of vitamin K, folate, and minerals such as calcium and iron.
- 45-50 days to maturity
- 6-12 hours of sun
- Sprouts in 5-8 days
- Ideal Temperature: 55-70 F
- Seed Depth: 1/4"
- Plant Spacing: 12"
- Frost Hardy: Yes
Growing Tips, Tricks and FAQs
Growing Tips
Komatsuna thrives in cool weather of 55-70 F and can be grown in spring or fall. It prefers well-drained, fertile soil with a pH between 6.0 and 7.5. Water consistently to keep the soil moist but not waterlogged. Mulching helps retain soil moisture and suppress weeds.
When to Grow
Plant Komatsuna in early spring as soon as the soil can be worked or in late summer for a fall crop. For those in colder regions or USDA zones with freeze dates, plant about 2-3 weeks before the last expected spring freeze or 6-8 weeks before the first expected fall freeze. Check local frost/freeze dates for precise timing.
How to Sow and Plant
Direct sow seeds 1/4 inch deep, spaced 1 inch apart in rows about 12 inches apart. Thin seedlings to 6-12 inches apart once they have a few true leaves. Alternatively, start seeds indoors 4-6 weeks before transplanting. Sprouts are ready in 5-8 days.
How to Grow
Komatsuna grows best in full sun but tolerates partial shade, requiring 6-12 hours of sun daily. Water regularly, especially during dry spells. Fertilize with a balanced organic fertilizer or compost tea every few weeks. Harvest leaves when they are young and tender for the best flavor, usually around 30-40 days after sowing.
How to Save
To save the seeds, allow pods to brown, dry, and become crispy. Shake pods into a paper bag to remove the seeds. Store seeds in a cool, dark, dry location.
FAQ
Can Komatsuna be grown indoors?
Yes, it can be grown in containers indoors with adequate light.
How often should I water Komatsuna?
Water regularly to keep the soil evenly moist but not soggy.
Is Komatsuna prone to pests?
It can be affected by common brassica pests like aphids and flea beetles. Use row covers and organic pest control methods as needed. Change locations each year to help reduce pest occurrence.
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