Japanese maple trees are one of the loveliest trees that can add beauty and color to any landscape. There are different varieties of Japanese maple trees, some of them can be left alone without pruning and some, just like the Cutleaf Japanese Maple (acer palmatum dissectum), should be pruned to improve appearance and keep them healthy. All you need is one afternoon weekend, use of correct pruning tools and techniques to accomplish pruning a Japanese maple tree.
Examine the overall appearance of the Japanese maple tree. Step back as far as you can that would allow you to see the entire tree form. Go around and look at the tree on all angles. Examining the tree will allow you to see shape and be able to picture how you would balance the overall look as you prune.
Go underneath the Japanese maple tree and remove the lower branches. If the tree is low-sweeping, you may need to do this while lying on your back on the ground. Cut the lowest branches that touch the ground.
Use a hacksaw to prune a Japanese maple tree. Hacksaws or handsaws are great for removing bigger and thicker branches. Use pruning shears to remove smaller ones.
Stand up again, look at the tree, and see if removing the lower branches have exposed more of the trunk.
Go back and cut more branches under the tree to increase the height of the trunk. "Crown Raising" is a pruning technique that would expose more of the trunk by removing the lower branches. Concentrate on removing the dead and wayward branches first before removing the healthier ones.
Stand up again and look at the overall appearance. Once you are satisfied, that you have exposed enough of the tree trunk and satisfied with the height of the crown, you can now proceed to "crown thinning," which is a method to remove some of the branches and leaves to let in more air and sunlight.
Thin the crown by removing some of the dead and crossed limbs on the upper portion of the tree. Remove them sparingly. Be careful when cutting or pruning. You have to examine the overall look before performing more cuts. Since branches take a while to grow back, at times taking a couple of years, be sure to remove them little by little.
Remove the cut branches and leaves from the ground. Throw them in a compost pile or recycle the branches by converting them into mulch.
Spray some water on the tree to eliminate small debris that fell through while cutting. This will ensure that your Japanese maple tree will have a clean appearance.