Continue to harden off tender summer bedding plants.
Lift and divide congested clumps of flag iris after flowering.
Prune Clematis montana after flowering.
Continue successional sowing of vegetables.
Keep mowing and feeding lawns when weather permits. Each time, lower the cutting blades slightly but not so much that the lawn will be 'scalped'.
Remove blanket weed and duck weed using a net or twisting it around a cane.
Prune early flowering shrubs such as Kerria japonica and Spiraea 'Arguta', as well as pyracanthas.
Tie in the shoots of vigorous climbers such as roses, vines and clematis.
Tidy up clump-forming spring-flowering perennials such as pulmonarias, cutting down the foliage to encourage new leaves to grow.
Cut back arabis, aubrieta and alyssum hard after flowering, to encourage the appearance of fresh, new growth.
Sow seeds of perennials including hardy geraniums, achilleas and alstroemerias outside in shallow drills.
Sow runner beans and French beans outside, two to the base of each bean pole or bamboo cane.