Mulch Problems
Q.

leaf collection around base of tree

Zone Beaverton Oregon | sinnemabob added on December 31, 2013 | Answered

Is there any risk of mold forming when leaves are raked and brought around the base of a tree? My concern in this wet Oregon winter climate is that this is a good environment for mold to reproduce and kill grass.

A.
A.Answers to this queston: Add Answer
Heather
Certified GKH Gardening Expert
Answered on January 2, 2014

Yes, any time you leave dead material out, there is the potential for mold or other problems (such as pests, disease or fungus) to develop, especially in wet environments.

I would recommend that if you are going to leave the leaves piled up around the tree, that you chop them up with a lawn mower. This will increase how quickly they decompose and reduce the amount of time they potentially have to develop a problem.

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