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Some trees and shrubs are not up to our cold season. In non-native species, therefore, it is particularly important to an optimal location and good winter protection, so they survive frosts unscathed. Clove flower (Ceanothus), bladder tree (Koelreuteria), camellia (Camellia) and garden marshmallow (Hibiscus) need a sunny, sheltered place.
Freshly planted and sensitive species should protect you from strong temperature fluctuations. Cover the root area with a layer of leaves or mulch and bind reed mats, burlap or fleece loosely around the shrub or the small tree crown. Plastic films are unsuitable because heat accumulates under them. With fruit trees, there is a risk that the bark will burst if the cooled stem is only one-sidedly heated by the sun. A reflective lime coating prevents this.
Evergreen and wintergreen broadleaf trees and shrubs such as Buchs, holly (Ilex), cherry laurel (Prunus laurocerasus), rhododendron, privet and evergreen viburnum (Viburnum x burkwoodii) need water even in winter. However, with frozen soil, the roots can not absorb enough moisture. To protect against drying up most evergreens roll their leaves. Prevent by vigorously pouring and mulching the entire root area before the first frost. Even after a prolonged frost period should be poured extensively. Especially with young plants, an additional evaporation protection from reed mats, burlap or jute is recommended.