Sow: aubergines, courgettes, cucumbers, peppers, pumpkins, winter squash, tomatoes (in heat). Sow under cover: hybrid broccoli, dwarf beans, late summer/autumn cauliflowers, celeriac, celery, and slightly later: runner beans, courgettes, cucumbers, kales, marrows, sweet corn, tomatoes. Sow in open: globe artichokes, beetroot, broad beans, sprouting broccoli, Brussels sprouts, autumn and winter cabbage, calabrese, carrots, kales, leeks, lettuce, Japanese bunching and pickling onions, parsley, parsnips, peas, radishes, rocket, spinach beet, summer spinach, turnips (in open). Plant: asparagus crowns, Brussels sprouts seedlings from under cover, spring cabbage, early summer cauliflowers, lettuce, onion sets, early and main-crop potatoes. Jobs: keep weeding, earth up early potatoes, support peas, prepare grounds for tomatoes, harden off seedlings started under glass, check flowering and setting of stone fruit, protect trees and fruit bushes against frost while they are in bloom; plant late flowering strawberries. Prick out aubergines, celery, celeriac, peppers, tomatoes.