. Campanula lactiflora & Salvia nemerosa ‘Caradonna’

Two plants that give generously a second time are pale blue Campanula lactiflora and dark spires of Salvia nemerosa ‘Caradonna’. After the first flowers have faded, trim off the spent bits and leave the leafy stalks below, which will quickly make side shoots. Both need good staking to keep them from toppling over. (Ravenhill Nursery, Ashton Glen, Marshwood Gardens, Owairaka Seeds)