By midsummer, repeat-flowering roses start to get long and leggy and, with heat and humidity, the foliage is often infected with black spot disease. That means it’s high time for their summer prune. It’s a bit more than deadheading to remove spent flowers, but not quite as hard as pruning you do in winter. The aim is to cut the bush back by about one-third, which encourages lots of new growth and sets it up for a good show of blooms in autumn. Even if roses are blooming, go ahead and cut them back – it’ll be worth it when you see the quality of the autumn display. If you find spindly growth, prune that off too, as it won’t amount to anything, and remove diseased leaves and stems. Once you’re done, water deeply, spread rose food around the base, then cover the surface with a mix of compost and straw. Follow up with a regular drink, then brace yourself for a big display of beautiful blooms about six weeks after pruning.