The plant materials generally used for hedges are mentioned elsewhere in this book. They include the tall background hedges of holly, thorn or wattle; the informal flowering hedges of rose, bridal wreath spirea or barberry; Such evergreens as mugho pine, globe arbor vitae, box or eunonymus (most of which are used as low edgings) and the colorful fruit and-nut hedges of thorn apple, hazlenut, cherry, beach plum, cranberry and quince.
And, of course, there are the formal clipped hedges. Of these, the Amur privet is by far the most widely used. In fact, the privet is used so universally that it is original to choose any of the above for hedging.
How to Plant Hedges
Hedge shrubs must be planted in the same manner as any other shrub, with soil preparation all-important to the continued life of the plant. The main consideration here is the spacing and planning of the plants in relationship to each other.
One way to get a straight hedge is to dig a trench the length of your intended hedge, with one side straight and your plants set against this straight wall. The depth of the plant depends on what you are planting, but privet may be set 3 inches deeper than it was before being transplanted.
How far apart the hedge shrubs are set again depends on what shrub it is, as some hedging materials are spreading and bushy. Privet is usually set 1 foot apart; barberry, 9 inches to 1 foot; larger shrubs, 2 to 4 feet.
The way hedges are trimmed has much to do with their health. While a flat top is neat looking, it is easily damaged by snow and ice accumulating on top. A rounded top is better, therefore, for northern winters. And hedges should be trimmed to slop outward from top to bottom so that the leaves on the bottom also get sun.
