• Position supports over tall and clump-forming herbaceous perennials such as delphiniums, heleniums, paeonies and rudbeckias.
• Sow radishes and summer spinach.
• Start planting container evergreen hedges such as holly and yew.
• Once flowers fade, prune winter-flowering jasmines so that new shoots and flowers form for next year.
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• Propagate lupins by taking basal cuttings and leave them to form roots in pots on a warm windowsill.
Reader’s question
Which strawberries can I plant now to ensure fruits this summer?
J Scrutton, by email
Plant special cold-stored strawberries in the open ground or containers; they will produce fruits 60-90 days later. Put them in a sheltered, sunny spot and a well-drained, fertile soil. To buy plants, call 0845 676 0607 or visit pomonafruits.co.uk.