Answer: Most perennial plants have a specific bloom time, which generally lasts 3-4 weeks. For variety, most gardeners supplement their plantings with annuals or perennials with different bloom times. This type of garden will provide interest for the entire growing season as each plant comes into its glory. As one fades, another can just be coming into its bloom season. There are some perennials that you can count on to bloom all summer long, including Rudbeckia (Black-Eyed-Susan), Cosmos, Marigolds, Petunias, Salvia, Verbena, Geraniums, and Zinnias. With a combination of the above sun-loving plants, your flower garden will always have something in bloom during the summer.
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