Trimming Large Trees
If you have some large landscaping trees growing in your garden, it may cause you some headache when you try to trim them. Trimming is a very important part of the maintenance work and it will help your tree to keep in shape. The dead branches will be removed and the size will be reduced to encourage new growth. Most large ornamental trees can grow more than 100 feet in height and they can form a specimen in your backyard. You should know some basic trimming techniques when you work on the large trees.
The first thing you need to do is to remove those dead or ill branches to encourage the new growth. Some sharp and clean pruning shears can be used to do this job. You should also remove those branches which grow in low location and nearly touch the ground. You should keep the trunk clean above five inches from the ground. This can create some space under the tree for people to sit or walk under the tree. Moreover, some interfering branches which cross on each other should also be trimmed as well. Constant rubbing of branches will cause damages on the bark which will make it easier to be infected by fungus and diseases.
When the old branches are removed, you should think about the overall shape you want your tree canopy to become. Generally, you should try your best to remove those V shaped branches and leave those U shaped branches. V shaped branches may break easily and they are susceptible to severe damages in strong winds or storms. The weak branches on the top should be trimmed as well to let the sunlight get through easily.
Image provided by John M [CC-BY-SA-2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons