Gadenin日本語Get the app
Brassica rapa var. perviridis
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- How to Sow Komatsuna: Soil Temperature, Depth and Spacing
- Thinning Komatsuna: When to Thin, How Far Apart, and Eating the Thinnings
- Komatsuna Growing Schedule: A Full Year of Sowings and Harvests
- Komatsuna Pests and Diseases: Flea Beetles, Caterpillars and Leaf Spots
- When and How to Harvest Komatsuna, and What Happens If You Leave It
- Growing Komatsuna in Pots and Containers: Depth, Mix and Watering
Common problems
Start from what you can see on the plant.
Pests and diseases (14)
Problems recorded for this plant, most serious first.
White Rust
CommonDisease
Creamy white slightly raised irregular pustules form on the leaf underside and burst through the skin releasing white powder. The upper surface turns pale yellow and heavy infection ruins appearance and market value.
Fusarium Yellows
Disease
Yellowing starts on the lower leaves, the petioles twist and the plant leans to one side. Vascular tissue browns, growth stops, and heading vegetables may die without ever forming a head.
Powdery Mildew
Disease
White patches appear scattered on the upper leaf surface at first, then the whole leaf is coated in a white powder. Leaves later yellow, brown and die back, and reduced photosynthesis cuts growth and yield.
Sclerotinia Rot
Disease
The crown, stem or head rots in a water-soaked way and is covered in white cottony mycelium. Black sclerotia later form inside and on the surface, and the plant wilts and dies.
Anthracnose
Disease
Light brown to dark brown round lesions with sharp margins form on leaves and fruit, slightly sunken in the center. In wet weather salmon-pink slimy spore masses ooze out on the lesions.
Gray Mold
Disease
Water-soaked brown lesions form on flowers, fruit and leaves, densely covered by a fuzzy gray mold. Fruit rots and drops, and decay continues in storage after harvest.
Downy Mildew
Disease
Pale yellow to yellow-brown angular lesions form on the upper leaf surface with a gray-purple mold in the matching spot underneath. Lesions merge, the leaves die back and the plant declines early.
