Geraniums provide summer-long blooms in the garden. These tender perennials cannot survive frost so they’re often grown as annuals or brought indoors to overwinter. Both new plants and overwintered plants benefit from pruning when you plant them out in early summer. Pruning encourages bushiness and helps maintain the geranium’s shape. Overwintered geraniums are especially prone to legginess after a season of minimal sunlight. Trim the plant throughout the summer season to encourage it to bloom profusely.
Dead flowers and leaves provide bedding material for the botrytis fungus, which can then infest your plants. Remove pruned plant material from the geranium bed and dispose of it promptly to avoid infection.