Readily
available mowed grass, or grass clippings, makes excellent tree mulch. The
amount of clippings used around trees depends on how dry the soil gets. One of
the main reasons for mulching trees is to keep the soil moist. If your area has
a sandy soil that dries quickly, layer 3 to 4 inches of grass clippings around
each tree. For moderately dry soil, cut that depth in half. Mowed grass also
keeps weeds down, because of the lack of sunshine getting to them, and the soil
temperature more even -- cooler during summer and warmer during winter.
Instructions
o
Mow your lawn. Spread the grass
clippings out in a thin layer. A patio or an area protected from the sun is
ideal. Allow the clippings to dry completely. This should take two or three
days. Transport the dry mowed grass to the trees to be mulched. A wheelbarrow
works well for this job.
o
Rake a 1-inch layer of mowed
grass evenly around each tree. Leave a 4- or 5-inch clear space around the
trunk. The grass should be spread out so that it extends 3 to 6 feet from the
tree trunk and thus covers the tree root area. The diameter of the tree's
branches is generally the same as that of its roots.
o
Pour another 1-inch layer of mowed
grass after the first inch has dried. Repeat the process as more layers of
grass clippings are needed.
o
Place additional thin layers of
mowed grass around trees as they are available and are needed. Grass clippings
decompose and blow away with the wind quickly. Therefore, it is an ongoing
mulching process with this material.
Tips & Warnings
· Do not place
thick, freshly mowed layers of grass clippings around trees. Such clippings
have a tendency to mat, which in turn causes a bad odour and stops air and
water from penetrating to the tree roots.
· Mounding
grass clippings around the trunk of the tree is not advised. They can hold
moisture at that location, which may cause the tree's bark to crack. This can
leave an opening for fungus, disease or insects.
Proper mulching
prevents soil erosion, and prevents light from reaching the surface of the
soil. Can enrich the soil by adding
nutrients, using the product obtained from composting as mulch acts as a good fertilizer. (Talking about trees with open/muddy ground
around and using composted grass as a mulch).
How much to Mulch:
Mulches should be around 2-4 inches high for trees. This is the appropriate height required that
gives effective covering to the soil.
The constituting substances used helps in making an easy decision. If the mulch is made of compost, the
thickness will be about 1-3 inches; if leaves; 4-5 inches; peat moss 1 inch
thick.
How to mulch.
Clean the area
before mulching. Remove all grass, weeds
and leaves near the tree, create a circular border (at least 3 inches
diameter), spread the mulch to required thickness, settle by watering.
Useful Tips.
Prepare mulch
according the type of tree or plant.
Do not pile up the
mulch against the stem of the plant or tree trunk.
If you are using
organic mulch, keep it well aerated and well drained.
If you face
drainage problems with the mulch, decrease an inch of the thickness.
Prevent excessive
moisture in mulch, as this might lead to rotting of the roots.
Excessive mulching
may lead to infestation by rodents and spread of certain diseases.
Spread the
grass clippings out in a single layer. Use a dry patio or other sheltered area
where the sun will not shine directly on the grass clippings.
Let the
grass clippings dry. Can take 2/3 days
depending on the weather
Apply 1
inch of grass clippings around the base of each tree. Rake the grass clippings
out about 3 to 4 feet away from the tree. Don't push the grass clippings up
against the tree trunk, but leave a space of 2 to 3 inches between the mulch
and the trunk.
Apply
additional 1-inch layers of grass clippings once a week as you mow your lawn.
Because the grass decomposes quickly, regularly application is necessary for it
to be an effective mulch.
Warnings
· Don't use fresh grass clippings as mulch for your trees. Fresh
grass can cause a solid mat to form, which will prevent the tree from taking
advantage of water and circulating air. Fresh grass can also encourage disease
and unpleasant odours to develop as it dries and decomposes.
http://www.bhg.com/advice/gardening/lawns/are-grass-clippings-used-as-mulch-good-for-trees
I've
heard conflicting information regarding grass clippings. I used clippings as
mulch around trees. Some people say it's good for the trees; some say it may
give the trees a disease. Who is correct?
Good mulches for the base of a tree include wood chips, pine
needles, and shredded bark. You can use grass clippings, too, but be aware of a
few things. If you put down fresh grass clippings in a layer more than a couple
of inches deep, the clippings can form a mat that discourages air from
penetrating the soil. This mat will eventually rot and smell bad. Make certain
that the grass from which the clippings were cut has not been treated with any
herbicides that might be harmful to trees. Grass clippings and other organic
mulches won't directly harm trees, but they can harbour rodents in winter that
feed on the bark. To reduce the chances of rodent feasting, as winter
approaches pull mulch away from the trunk. Wrap young trees with hardware cloth
or tree wrap.
Mulch can kill trees–that sounds kind of extreme, doesn’t it? But it
caught your attention, right? I suppose it would be more accurate to say improper mulching can kill trees, but as I look around me, improper mulching of
trees seems to be the standard practice, the only kind of mulching around trees
that’s being done. ...... they
apparently didn’t realize that the way they mulched the trees would eventually
kill them.
How does mulch harm trees?
When you put mulch around the trunk of a tree and cover
the root flare, you are covering up parts of the tree that were meant to be
exposed to air. The excess moisture can cause rot, but the trunk of the tree is
supposed to have access to air, and by piling up mulch against the bark you are
preventing this. If the mulch is left there long enough, the tree will try to
compensate by growing adventitious roots. Unfortunately, these same roots can
wind up wrapping around the tree and girdling it.
The tree
winds up killing itself. So we have three ways improper mulching can kill a
tree:
1. rot
2. suffocation
3. girdling
In addition, the
stress of improper mulching could make the tree more vulnerable to a secondary
problem, such as an insect infestation.