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How
To Prune
Large trees aside, there are many pruning jobs that you can do on your
own. In all cases, the key is to prune the unwanted branch while
protecting the stem or trunk wood of the tree. Tree branches grow from
stems at nodes and pruning always takes place on the branch side of a
stem-branch node. Branches and stems are separated by a lip of tissue
called a stem collar which grows out from the stem at the base of the
branch. All pruning cuts should be made on the branch side of this stem
collar. This protects the stem and the other branches that might be
growing from it. It also allows the tree to heal more effectively after
the prune. To prevent tearing of the bark and stem wood, particularly in
the case of larger branches, use the following procedure:
1.
Make
a small wedge shaped cut on the underside of the branch just on the branch
side of the stem collar. This will break the bark at that point and
prevent a tear from running along the bark and stem tissue.
2.
Somewhat farther
along the branch, starting at the top of the branch, cut all the way
through the branch leaving a stub end.
3.
Finally, make a
third cut parallel to and just on the branch side of the of the stem
collar to reduce the length of the stub as much as possible.
A similar procedure is used in pruning one of two branches (or one large
branch and a stem) joined together in a 'u' or 'v' crotch. This is known
as a drop crotch cut. Make the first notch cut on the underside of the
branch you're pruning well up from the crotch. For the second cut, cut
completely through the branch from inside the crotch well up from the
ridge of bark joining the two branches. Finally, to shorten the remaining
stub, make the third cut just to one side of the branch bark ridge and
roughly parallel to it.
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When to Prune »
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Above
diagrams adapted from US Forest Service diagrams |