Many varieties offered today enhance cut flower gardens. One of the keys to success with zinnias is avoiding foliage diseases such as mildew and leaf spots. These problems do not become serious unless the leaves are wet or moist for long periods.
Zinnias are among the oldest favorites as garden or cut flowers.
They must have full sun, a loose, fertile soil, and plenty of soil moisture. Gardeners may start zinnias from seed or purchase transplants in trays or packs. Regardless of which method you choose, the soil must be thoroughly prepared by plowing, spading or rototilling . All debris such as roots, rocks or other extraneous material should be removed. The area should be raked and leveled for a seedbed condition.