How to Properly Mulch Around Trees (read more)
by admin ~ October 19th, 2008This is an all too common site, mulch piled high around a tree trunk.
For a good example of improper mulching and the damage it causes, look at the Cypress in the boulevard entering Bluestem from Santa Fe. (Note that the trunks are starting to spilt) The damage you see is a result of a combination of the below:
- Deep mulch can lead to excess moisture in the root zone, which can stress the plant and cause root rot.
- Piling mulch against the trunk or even the stems of other plants, stress the trees & plants tissues. A stressed plant or tree will most likely lead to insect and disease problems.
- Some mulches, especially those containing cut grass, can affect soil PH. Continued use of certain mulches over long periods can lead to deficiencies or toxicities in the soil because of the high nitrogen levels created by the grass clippings and the suffocation of the micro organisms in the soil.
- Mulch piled high against the trunks of young trees may create habitats for rodents that chew the bark and can girdle the trees.
- Thick blankets of fine mulch can become matted and may prevent the penetration of water and air. In addition, a thick layer of fine mulch can become like potting soil and may support weed growth.
In closing, trees once stressed by improper mulching never really achieve their potential beauty.
Remember: If the tree had a say in the matter, its entire root system (which usually extends well beyond the drip line) would be mulched.
The Original Red Dirt Gardener www.reddirtgardening.com



