Looking for a summer flowering annual with a long bloom period? Zinnias are just that—and they draw a variety of pollinators. "When flowers are in full bloom, they attract an array of bees, beetles, butterflies, and moths," says Adrienne Roethling. When choosing a variety, opt for disease-resistant profusion zinnias (Zinnia elegans 'Profusion'). "The profusion series is a hybrid with results that include medium sized, colorful blooms on short stems," she says. They are also self-cleaning, meaning there is no deadheading required.