You can improve your chances of creating a beautiful garden with the addition of fertilizers designed for specific plants. You could start with an all-purpose fertilizer like hen manure, a natural fertilizer rich in calcium that's excellent for influencing healthy plant growth. Another basic choice is composted manure, long used by farmers to support crop growth. For years of continuous growth, shrubs and trees stay healthy with the help of specialized fertilizers. These are rich in organic nitrogen, phosphoric acid, soluble potash and calcium. They're also good for both deciduous and evergreen trees and shrubs.