Feed after a light trim
1 Remove any spent blooms and buds that failed to flower as this will encourage new growth. 2 Prune back the dead, damaged or diseased stems to healthy wood. Keep the shrub in good shape by removing weak and spindly twigs. 3 Feed with a slow-release ericaceous plant food and fork it in. Don’t feed after midsummer as new growth may fail in colder weather. 4 Water your azalea well throughout summer. They prefer rainwater, as it is less alkaline. If you only have tap, let it stand in a watering can for 24 hours so the chlorine evaporates.