Keep fruit bushes well-watered in dry spells to allow fruit to swell. Plums, pears and apples can be thinned out now too. This happens naturally as well, but if you want bigger fruit, remove some of the smaller fruitlets.
Check brassicas (cabbages, broccoli, turnips, Brussels sprouts) for butterflies laying their eggs – often you will find them on the underside of leaves. Remove these, as when hatched as caterpillars they can completely exfoliate your plant.
Continue successional sowing of salads, and sow cucumber, sweetcorn, squash, French, runner and broad beans outdoors.
Move citrus fruit outdoors for the summer.
Pop a few nasturtium seeds in the ground or pots for a cascade of flowers in late summer.
Consider installing a water barrel to conserve rainfall.
Earth up potatoes. New potatoes may be ready to harvest, depending on when planted.
Prune springflowering deciduous shrubs, such as kerria, philadelphus, forsythia, ribes and weigela, as soon as they are finished flowering.