Kramer Tree Specialists, Inc., Complete Professional Tree Care, Dormant Season Services

Frequently Asked Questions
About Mulch Products

Kramer Tree Specialists made a commitment many years ago to recycle our wood products from our tree operations. Our motivation for investing in the recycling equipment, tractors, etc. was to be a part of the solution regarding the landfill crises. We felt that by producing mulch products that were aesthetically pleasing and at an affordable cost, what better way to continue the cycle of keeping trees healthy and to encourage people to properly apply mulch for the benefit of their trees and plants.

Over the years, many questions regarding mulch products, the production of mulch and the proper application of mulch have arisen. The three most common are:

  • Does your mulch have bugs and/or diseases? The answer is no. Our brush/chips are processed through wood grinding recyclers. Few insects could survive that process; furthermore insects need a host, which has been destroyed. In reference to diseased trees, once the brush/chips have been processed through the recycling equipment (some products 2-3 times), the mulch is stored in piles. Due to the pressure and decomposition process the temperatures can reach up to 180 degrees. Therefore, no insect or disease could survive or be transmitted with that level of heat and pressure.

    We encourage you to purchase your mulch products from local natural resources, but be aware of the “free” brush chips that pose a threat to trees and plants, as they have not gone through the decomposition process. However, brush chips are excellent for paths.

  • What is growing in my landscape mulch? See article to the right or click the link to download an informative PDF brochure — What is Growing in My Landscape Mulch?

  • How deep should I apply the mulch to my trees? The proper depth would be 2” to 3”. Most importantly is to keep the mulch away from the tree trunk – do not apply mulch up the trunk of the tree – leave at least 6” to 8” away from the tree trunk. When you see “mulch muffins” or “volcano” mulched trees usually installed by landscape contractors, do not duplicate that application!

    If mulch is left long enough up the trunk of a tree it will girdle and rot the bark/cambium tissue and will cause the tree to break off at that point, (if a young tree) or in more mature trees, will not allow the vascular system to carry water and nutrients up through out the crown of the tree – causing its demise.

What Is Growing in My Landscape Mulch?

(PDF publication from the Department of Plant Pathology at PennState College of Agricultural Sciences)

Landscape mulches are used to protect soil, conserve moisture, moderate soil temperature, and limit weed growth, as well as beautify and unify landscape plantings. Most mulches are mixtures of shredded wood and bark residues from lumber and paper mills, arboricultural and land-clearing operations, and wooden pallet disposal or recycling facilities.

Like other organic matter, wood and bark decompose over time. The primary organisms involved with their decomposition are bacteria and fungi, which derive their energy for growth from the carbon-based compounds found in wood and bark. These compounds include cellulose, lignin, and simple sugars. Bacteria are microscopic organisms that are not visible in the mulch. Fungi also may be microscopic, but many develop visible reproductive structures.

The fungi involved in the decomposition of landscape mulches are natural components of the environment. Some fungi, such as the artillery fungus, are "recyclers" and break down woody tissue directly. Other fungi, such as slime molds, consume bacteria and other organisms living in the mulch. These fungi are not harmful to landscape plants and no known health hazards are associated with them unless they are eaten. They can be found April through October, usually following rainy weather.

This PDF publication from the Department of Plant Pathology at PennState College of Agricultural Sciences describes the four common types of fungi growing in landscape mulches in the eastern United States--mushrooms, slime molds, bird's nest fungus, and the artillery fungus.

Click on the link below to download a PDF version of the publication.

What is Growing in My Landscape Mulch?



From: PennState College of Agricultural Sciences

KTS Complete Professional Tree Care

Kramer Tree Specialists Spring 2010 Newsletter
MSpring 2010 KTS Newsletter

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300 Charles Court,
West Chicago, Illinois 60185
Tel: 630-293-5444
Fax: 630-293-7667

Last Updated: 1/21/10