WE may still be in the midst of summer, but it’s almost time for autumn-flowering bulbs, such as autumn crocuses, colchicum, sternbergia, amaryllis and nerine, to be planted.

Some seeds are best planted just after collection, and others may need specific climatic conditions to break dormancy (e.g. some alpines). If unsure, then sow seeds in ‘batches’, one immediately after collecting, one in winter, and one in the following spring, according to advice from the Royal Horticultural Society.

Meanwhile, find time to ensure you get the best out of your high summer blooms.

Cutting back plants in baskets followed by feeding can encourage new growth and help revive tired displays.

Cut back delphiniums and geraniums after the first flush of flowers to encourage a second flowering period. Feed after cutting them back.

Deadhead flower borders regularly to prolong flowering. Disbud and dead-head dahlias if growing for large blooms. Leave roses that produce attractive hips.

Plants with a carpet-like growth habit, e.g. some alpines, can become patchy, with central areas dying off. These patches can be in-filled with gritty compost, to encourage re-growth.

Take cuttings of patio and container plants ready for next year.

Pinks and carnations that have become leggy, can be propagated by layering or by cuttings. Propagation can improve the appearance of untidy clumps.

Prop up tall perennials such as lupins, delphiniums and gladioli, if staking was neglected earlier in the season.

Liquid feed containerised plants and keep well watered in dry spells.

Some late-flowering border perennials may benefit from a quick-acting feed before they come into bloom, especially if the soil is not very fertile.

Mulching borders can help retain moisture, and keep down the weeds – this will save a lot of work. A really thick layer of mulch (5-7.5cm/2-3in all over) works best.

Most perennial weeds are best dealt with in the summer when the weeds are in active growth. Digging out often works, but applying a weedkiller can be more practical, particularly for large areas.