Hardy types may be planted in either the fall or spring, although spring is the more suit-able time since plants will have full summer growth established before cold weather. The distance between plants varies with type, but ordinarily 18 to 24 inches will give sufficient space. The depth of the plants should be such that the soil comes to the top of the crown of roots. Always water plants well immediately after setting. The method of growing all groups is essentially the same.
Some protection is needed in the northern states during, the winter.
Tall plants should be staked. Preferably the tips should be pinched off when the plants are small, and again later on to induce bushy growth. By pinching out some of the lateral buds larger terminal blossoms can be produced. A number of insects, especially aphids, as well as several fungus diseases, such as rust, mildew, and blight, are commonly found on chrysanthemums. The regular use of chemical Dust that controls most chewing insects, sucking insects, and fungus diseases, will stop damage before it gets started.