Zinnias are annuals, so they'll grow for one season and produce seeds, but the original plant will not come back in subsequent years. They have bright, solitary, daisy-like flowerheads on a single, erect stem, which makes them great for use as a cutting flower or as food for butterflies.

Photo by: Unverdorben Jr / Shutterstock. One of the easiest annuals to grow, zinnia flowers bring an explosion of color wherever they go. The show lasts from late spring until the first frost in fall. Butterflies and hummingbirds are attracted to the cheery flowers that bloom in nearly every bright color imaginable.

Plant the seeds only about ¼-inch deep. You'll see seedlings sprout in four to seven days. Once the seedlings reach about three inches tall, thin them so that they're 6 to 18 inches apart to maximize air circulation, a key to keeping zinnias looking good all season.

Planting: Plant zinnias in spring after all danger of frost has passed, around the same time you'd plant tomatoes. Zinnias are easy to grow directly-seeded into the garden. For sooner blooms, start seeds indoors 4 to 6 weeks before your last frost date.. . . . .364011234046!]0000000000000009783314144573!]