The key to producing quality crops of this popular winter vegetable is to select hybrid varieties, from which the sprouts are picked while small and firm.
Sow under cover early in spring for harvest in September.
Follow this with the mainoutdoors in shallow drills
2.5 cm (1 inch) deep and 15 cm (6 inch) apart in March/May.
Water thebefore lifting and transplanting to the cropping site, spacing at 60 cm x 60 cm (24 inch x 24 inch).
Hoe occasionally to destroy weeds until cropcover the soil and naturally smother weed growth. During dry weather water well and apply a liquid fertiliser. This treatment is essential for some of the high-yielding new F1 hybrids.
Snap off the largest and lowest sprouts as soon as they are big enough to use. Varieties that are specially bred for freezing tend to crop all at once; late varieties crop over a longer period – November to March.
Pest Damage Control
Whitefly Feed on plant sap. Honeydew excreted encourages sooty moulds. Spray with resmethrin
Caterpillars of Cabbage White butterfly Rapidly eat leaves. Spray with derris or pick off by hand.
Cabbagefly Roots eaten. Plants wilt or are killed.
dressings. Use of Brassica collars. Dust the base of the plant at transplanting with an derris.
There are two main diseases, which affect all brassicas:
worst on heavy, poorly-drained and acidic soils. Control with lime,, rotation.
more problematic in the SW of England and in warm moist seasons. Some varieties of some brassicas are more resistant that others.