Bark is one of the most durable materials for mulching. Bark litter is recommended both for its decorative and insulating properties. It protects the soil against sudden temperature changes and against crusting. It is obtained from various types of trees, both coniferous and deciduous. The most common on sale is the one made of conifers - decorative, acidic, perfectly reduces the acidity of the soil. The bark of deciduous trees is less ornamental, and after composting it may have a different reaction than the initial one.It is worth remembering when mulching plants that are sensitive to soil pH.
Advantages of mulching with bark
It is advantageous to mulch the soil with bark throughout the growing season. In spring and summer, the thickness of the layer should be small, 2-5 cm, so that the roots and base of the plants do not rot. In winter, however, the litter layer should be 10-12 cm thick.
The bark layer protects plant roots against both frost and overheating - it is an excellent insulating material. Plants sensitive to frost (budleja, hydrangeas, azaleas, roses, magnolias, tulip trees or broom) should be mulched in autumn, as soon as the first frosts appear. Mulching with bark also prevents the soil from freezing, which is especially important for evergreen plants. The frozen ground prevents them from taking water from the ground. The bark perfectly regulates water relations. It does not allow water to evaporate from the substrate and absorbs and retains moisture by itself.
Decaying bark does not contain many nutrients, but it improves the physical and chemical conditions of the soil enriching it with organic matter. It is especially recommended for plants that prefer acidic or slightly acidic soil. It is perfect for the cultivation of fruit trees and shrubs such as: gooseberries, blueberries, chokeberries, cranberries and strawberries. It is especially beneficial for raspberries. The bark of conifers can also be mulched acidophilic: heathers, rhododendrons, conifers, hydrangeas and pierises.
