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Brassica oleracea var. botrytis
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- Growing Cauliflower Seedlings: Sowing to Planting Out
- Cauliflower Care: Watering, Feeding and Unchecked Growth
- Cauliflower Heads: Blanching, Ricey Curds and Buttoning
- Cauliflower Growing Calendar: Summer, Autumn and Winter Crops
- Cauliflower Pests and Diseases: What to Watch and When
- When to Harvest Cauliflower and How to Keep It
Common problems
Start from what you can see on the plant.
Pests and diseases (22)
Problems recorded for this plant, most serious first.
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.
Black Rot
Disease
V-shaped yellowing spreads inward from the leaf margins and the veins darken into a black network. As it advances the whole plant wilts and dies.
Diamondback Moth
Pest
Larvae graze the leaf tissue from below, leaving the upper skin as white window-like patches. As they grow they chew many small holes and also attack the growing point.
White Rust
Disease
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.
Bacterial Soft Rot
Disease
The crown or the head becomes water-soaked and soft, then collapses into a slimy mush. The rotting tissue gives off a distinctive foul odor.
Onion Thrips
Pest
Fine white stippled scars run in vertical lines along the leaf surface, and the whole leaf eventually turns whitish. Growth stops and both yield and quality suffer.
Root-lesion Nematode
Pest
Elongated blackish brown necrotic lesions form on the root surface and fine roots rot away. Above ground the stand is uneven and plants stay small with pale foliage.
Root-knot Nematode
Pest
The plant wilts in the daytime and does not recover with feeding or watering. Pull it up and the roots carry beaded chains of galls of varying size with few fine roots.
Clubroot
Disease
Leaves wilt during the day and recover morning and evening, and growth is markedly poor. Pull the plant and the roots carry many spindle-shaped or irregular galls.
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.
Verticillium Wilt
Disease
Only one side of the lower leaves yellows and wilts, and the symptom moves up the plant. Stem vascular tissue turns pale brown and the plant dies without ever growing well.
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.
Ring Rot
Disease
The bark of branches and trunk becomes rough and warty, serving as the inoculum source. Fruit develops round brown lesions that soften and rot in concentric rings.
