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Tree Mulch Volcanoes

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Improper Mulching kills trees. The NJ DEP Division of Parks and Forestry advises that mulch should never be piled up against the tree trunk. Mulching in a "volcano" shape can make the tree more susceptible to fungus, insects, and rodents. Instead mulch in a "donut" shape. Keep mulch 6" from the trunk and mulch out as far as the branches extend above. Keep mulch 2-4" thick. Every spring, break up old mulch and add new to maintain a 2-4" layer.

For more information about proper mulching techniques and benefits:


Trees are Good
treesaregood.com/treecare/resources/ProperMulching.pdf

Volcanoes Killing Trees in New Jersey
rutherford-nj.com/shadetree/Proper_Mulching.pdf


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