A genus of plants in the mustard family (Brassicaceae) that includes broccoli, cabbage, cauliflower, kale, Brussels sprouts, kohlrabi, turnip, and bok choy. All share similar growing requirements and pest susceptibilities.
The Brassica family encompasses dozens of edible species, all characterised by their four-petalled flowers and distinctive growth habits. In Australia, brassicas are primarily grown as winter crops, with planting occurring in late summer (February-April) for autumn and winter harvesting. They perform exceptionally well in cooler climates (zones 6-9) and highland areas, though southern regions can grow them year-round.
Brassicas prefer well-draining, fertile soil rich in organic matter. Add compost or aged manure before planting, and maintain consistent moisture throughout the growing season. Most varieties need full sun (6-8 hours daily) and benefit from regular fertiliser applications every 3-4 weeks. Available from most Bunnings stores as seedlings or seeds, popular Australian varieties include 'Greenskin' cabbage and 'Green Magic' broccoli.
Common pests include cabbage white butterflies, aphids, and flea beetles, manageable through companion planting (try nasturtiums as trap crops) or organic sprays. Brassicas are nutrient-heavy feeders, so avoid planting in the same bed consecutively. For best results in tropical zones, grow as winter crops or choose heat-tolerant varieties. Harvest when heads are firm but before flowering for optimal flavour and nutrition.