In addition to the information on this postcards, Zinnias want you to know that it’s best to plant them in full sun and soil where there is good drainage. If you pick them frequently, they will continue to flower through the summer. Don’t stress about mildew on the leaves…this is usually a cosmetic problem only, and you’re going to strip off that foliage when you put the stems in a bouquet anyway, right? Zinnias are a celebration of summer, color and cut flowers that you can share.