Crop overview
Cabbage is a leafy brassica that forms a firm head. It is a staple in Kenyan homes and markets and grows best in cool conditions.
Importance of the crop
Cabbage is eaten daily and keeps and travels better than many leafy vegetables. It is also a useful rotation crop after tomatoes and chillies because it belongs to a different plant family.
Suitable climate
Cabbage prefers cool to moderate temperatures and steady moisture. Cooler highland areas can suit it well, but the variety should match your altitude and season.
Verify locally: figures, varieties and product choices differ by altitude, season and variety. Confirm with your county agricultural extension officer or KALRO before acting.
Soil requirements
Choose fertile, well-drained loam rich in organic matter that holds moisture. Very acidic soils encourage clubroot, so test soil pH and ask your extension officer about liming.
Land preparation
Plough deeply, break up clods and mix in well-decomposed manure or compost. Make level or slightly raised beds. Rotate with non-brassica crops such as tomatoes, onions or maize rather than planting cabbage, kales or other brassicas on the same land repeatedly.
Seed and seedling selection
Choose a variety to suit your market, season and preferred head size, and look for disease tolerance. Buy certified seed from registered suppliers.
Verify locally: figures, varieties and product choices differ by altitude, season and variety. Confirm with your county agricultural extension officer or KALRO before acting.
Nursery management
Raise seedlings in a clean nursery bed or trays, lightly shaded and watered regularly, and harden them off before transplanting. Seedlings with a good root system establish faster. See our nursery guide.
Transplanting
Transplant sturdy seedlings in the evening or on a cloudy day into moist soil, plant firmly and water immediately. Fill gaps within the first week.
Spacing
Spacing depends on the variety and head size. Follow your seed supplier's recommendation. Closer spacing gives smaller heads and wider spacing larger ones.
Verify locally: figures, varieties and product choices differ by altitude, season and variety. Confirm with your county agricultural extension officer or KALRO before acting.
Fertilizer and manure
Cabbages are heavy feeders, especially of nitrogen. Use well-decomposed manure or compost, and base fertilizer rates on soil tests and local advice. Too much nitrogen can cause loose heads and more pests.
Verify locally: figures, varieties and product choices differ by altitude, season and variety. Confirm with your county agricultural extension officer or KALRO before acting.
Irrigation
Keep soil evenly moist, especially during head formation. Sudden heavy watering after a dry spell can split heads. Drip or careful furrow irrigation works well, and mulch reduces water loss.
Weed management
Weed regularly, especially in the first weeks when seedlings compete poorly. Hoe shallowly and mulch between rows.
Pest management
Common pests include diamondback moth caterpillars, aphids, cutworms and other leaf-eating caterpillars. Scout weekly, including under leaves, and pick off caterpillars where practical. Rotation, removing crop residues and avoiding continuous brassica planting all help. If spraying, use registered products only, follow label directions and pre-harvest intervals, and get advice on rotating product types to slow resistance.
Verify locally: figures, varieties and product choices differ by altitude, season and variety. Confirm with your county agricultural extension officer or KALRO before acting.
Disease management
Look out for black rot (V-shaped yellow patches from leaf edges), clubroot (swollen, deformed roots), downy mildew and soft rots. Use clean seed, rotation, good drainage and field hygiene, and have problems identified by an extension officer.
Verify locally: figures, varieties and product choices differ by altitude, season and variety. Confirm with your county agricultural extension officer or KALRO before acting.
Common problems and solutions
| Problem | What to do |
|---|---|
| Plants stunted and wilting, roots swollen | Likely clubroot. Rotate for several seasons, check soil pH and seek advice. |
| Holes in leaves | Caterpillars. Scout early, remove them and seek control advice. |
| Heads split | Uneven watering. Keep moisture steady and harvest on time. |
| Yellow V-shaped patches on leaf edges | Possible black rot. Use clean seed, rotate and remove infected plants. |
| Loose, small heads | Often too little water, poor nutrition, crowding or heat. Review spacing, feeding and watering. |
Harvesting
Harvest when heads are firm and have reached a good size. Cut at the base with a sharp, clean knife, leaving a few wrapper leaves to protect the head. Harvest on time because mature heads can split.
Post-harvest handling
Harvest in the cool of the day, keep heads shaded, trim damaged outer leaves and pack in clean sacks or crates without overfilling. Cabbages keep better when cool and handled gently.
Expected production
Yields vary widely with variety, management, altitude and season, so we do not quote a figure here. Keep your own records each season to learn what your land really produces, and ask your extension officer for realistic local figures.
Verify locally: figures, varieties and product choices differ by altitude, season and variety. Confirm with your county agricultural extension officer or KALRO before acting.
Marketing
Sell to local markets, schools, hotels, supermarkets and traders. Grade by head size, keep heads clean, and stagger planting so you do not harvest everything at once.
Frequently asked questions
Why is cabbage good after tomatoes?
It belongs to a different plant family, so it does not share the same diseases and helps break pest and disease cycles.
What is clubroot?
A soil disease that swells and deforms roots and stunts plants. Prevention through rotation and soil care is the practical approach, so ask an extension officer about your field.
How can I reduce caterpillar damage?
Scout weekly, hand-pick, avoid continuous brassica planting, destroy residues and get advice on registered products.
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