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A picture of a Komatsuna

Komatsuna

Brassica rapa var. perviridis

Partial Shade
Moderate care
Moderate watering
Frost Hardy

9a

USDA zone

-7°C

Minimum temperature

Expected size

Height
Spread

40cm

Max

20cm

20cm

Min

15cm

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

Komatsuna Overview

Brassica rapa var. perviridis is commonly known as Komatsuna. This hardy, leafy green is a variety of the Japanese mustard spinach that is technically a brassica. However; its tolerance of cold weather makes it a popular choice for northern hemisphere gardeners to grow over the winter months and it is less likely to bolt when the weather warms up. High in calcium, Iron, Vitamins A and C, this mild mustard tasting green leaf develops more of a bite as the leaves mature. So it is recommended to pick smaller leaves regularly.

Common problems with Komatsuna

Cabbage aphids, cabbage root maggot, cabbageworms , flea Beetles and cutworms may affect cabbages. Control by keeping beds weed free and handpick worms. Avoid wetting foliage if possible to prevent Alternaria porri.

How to harvest Komatsuna

Leaves can be harvested within a few weeks of sowing.

How to propagate Komatsuna

Seed

Do not sow too early in the summer as the plant will bolt. Sowing time should be late summer/autumn with a spacing of 30 cm. Sow between 10 - 15 mm deep.

Special features of Komatsuna

Crop rotation

Heavy Feeder; alternate with legumes, light feeders or other heavy feeders.

Pot plant

Can be grown in containers at least 20cm across.

Other uses of Komatsuna

Culinary

Edibles to Plant Out in June

Young plants started off indoors can now be planted out.

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