WINTER PROTECTION AND MULCHING : Page 228
Trees and Shrubs—Winter Protection of. When mulchingtrees care should be taken to extend the mulch out as far as the rootsextend, or at least as far as the ends of the branches extend. Mostof the Japanese flowering peaches, cherries, etc., need a four-inch rootmulch every winter in severe climates. Boxbushes, many other ever-greens, and some deciduous material should be tied in winter. Thisis done to keep the plant from splitting under the weight of the heavysnows. Bands of rye straw or burlap are better than string for tying.Shrubs and trees when planted in groups or plantations, being thusclose together, will protect each other to a considerable extent.