How to Mulch Around Trees and How Deep to Mulch

HOFFMAN ESTATES, Ill. - July 18, 2013 - PRLog -- Mulch can reduce water loss from evaporation, control weed growth, improve soil quality and reduce plant disease. It will add a professional appearance and reduces damage from weed trimmers.

A 2 to 4 inch layer of mulch will protect the delicate roots that absorb water, oxygen and minerals. These roots are located in the top few inches of soil. Mulch helps control fluctuations in temperature and moisture.

You want to mulch wide rather than deep. Spread the mulch out to the width of the branches where possible. Keep the base of the tree and the root crown exposed. The root crown is the main root that breaks away from the trunk. This needs to breathe.

You do not want to create a “mulch volcano”, a mass of mulch piled high against the trunk. Covering the trunk can damage stem tissues, leading to disease and insect problems.

The best depth is 2 to 4 inches. Deep mulch can cause excess water to build up around the surface roots. The mulch needs to dry out. Once a year, rake the mulch thoroughly to keep it from getting matted. You want water and oxygen to move through this layer.

Use natural mulch rather than rubber mulch. Rubber mulch can overheat and dry out  the delicate surface roots and the bark.

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