Harvesting Broccoli

Broccoli has moderate water needs but performs best with consistent moisture, especially during head formation. Water deeply once or twice a week during dry spells, aiming for the base of the plant rather than overhead to minimise fungal issues. In hot summer weather, increase watering frequency; wilting or drought stress can cause premature bolting or small, bitter heads. Feed broccoli in May and June with a balanced general-purpose fertiliser or a nitrogen-rich feed to support leafy growth and head development. A liquid seaweed feed every two to three weeks is also beneficial. Avoid overfeeding with nitrogen late in the season, as this encourages soft growth vulnerable to frost and pests. Broccoli is hardy and tolerates light frosts, which can actually improve flavour. In autumn, plants will continue cropping into October or even November in mild areas. No special overwintering protection is needed for summer-planted varieties, though fleece can extend the harvest if temperatures drop sharply. Common pests include cabbage white caterpillars, which can defoliate plants rapidly—inspect undersides of leaves regularly and pick off eggs and caterpillars by hand, or keep plants netted. Aphids cluster on young shoots and under leaves; wash off with a strong jet of water or use an insecticidal soap. Pigeons are persistent; netting is the only reliable deterrent. Clubroot is a serious soilborne disease causing stunted, wilted plants; practice crop rotation, moving brassicas to a different bed each year, and lime acidic soils to raise pH above 7 if clubroot is present.