Prolong Blooming – Remove Old Bloom Spikes
By August many gaps have developed in the flower garden, especially in the borders. Some annuals that provided seasonal color have died out, and need replacement. Make plantings of the fall flowering annuals or some of the short day flowers. Try plantings of zinnias, marigolds, balsam, petunias, and nasturtiums for another splash of late color. Many garden centers may have a supply of geraniums for planting in August to give fall color. Also, some of the perennials will be available as container plants and can be used very effectively. Dahlias may be cut back to stimulate a new crop of late flowers.