Zinnia

Zinnias are low maintenance, heat and drought tolerant, and are available in many colors. These popular warm-season annuals in the daisy family are very easy to grow. As well as colors, they come in a wide range of sizes, from 6 inches to 4 feet (1.22 m) tall; with single (single row of petals and a visible center), double (numerous rows of petals, centers not visible) or semi-double blooms (numerous rows of petals with visible centers). Zinnias also come in various shapes, including beehive, button, and cactus. 

Depending on the size, they can be used in the front or the back border, in containers, or massed for season-long color. Plant in average well-drained garden soil in full sun. Keep them moist while getting established. Zinnias add color to the garden all season long. Deadhead to encourage more bloom but leave on some seed heads for the birds.

There are multiple varieties or cultivars in the Zinnia family, including the hybrid 'Profusion' Series. A cross between Zinnia angustifolia (disease resistance) and Zinnia elegans (larger flowers) combines the best traits of both including drought tolerance, heat tolerance, humidity tolerance, and low maintenance. The strong, durable foliage resists insects and repels deer and rabbits.

Insects, Diseases, and Other Plant Problems: Susceptible to powdery mildew. Do not crowd them; allow good air circulation.

 VIDEO Created by Elisabeth Meyer for "Annuals, Perennials, Vines, and Groundcovers" a plant identification course offered in partnership with Longwood Gardens.