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.
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.
Cactus flowered zinnias have been around for decades and they remain amongst the most lovely annuals. They include almost every color of the floral rainbow except blue. Plants grow to 3 feet in height and are covered with 4-5 inch shaggy blooms.
Zinnia and Dahlias are both genus within the aster (daisy) family. This means that the two flowers are a general term for two different groups of plants that contain well over 20 different species each.. . . . .364011233335!]0000000000000009783314145758!]