Pruning Hemlock Trees: A Comprehensive Guide for Beginners
Introduction
Hemlock trees are a popular choice for landscaping due to their attractive appearance and versatility. They can be used as privacy shrubs or as focal points in the landscape. While hemlocks generally don’t require pruning, there are certain situations where it becomes necessary, such as weather damage, disease, or competing main trunks. This guide will provide you with all the information you need to know about when and how to prune hemlock trees.
When to Prune Hemlocks
The best time to prune hemlock trees is either in spring or early summer. During this time, the tree is actively growing and will recover quickly from any pruning. Avoid pruning in fall and winter, as this can confuse the tree and cause it to continue growing instead of going dormant. Pruning during these seasons can also weaken the tree and make it more susceptible to cold damage.
How to Prune Hemlock Trees
Trimming Hemlock to Correct Damage from Weather or Disease
High winds or heavy snow can sometimes damage hemlock branches. You may need to prune the tree to remove damaged branches or to reshape it. Disease can also kill back branches, which will also require removal.
To prune hemlock branches, use a clean, sharp pair of pruning shears or a pruning saw, depending on the size of the branches. Clean and sharp tools will help prevent the spread of disease.
First, select the branches that need to be removed. Avoid over-pruning by carefully considering each branch before cutting.
Make your pruning cuts just above the needle whorls. Hemlock trees will grow new branches from the needle whorls, and pruning just above them will ensure that the new branches grow in properly.
If the damage to the hemlock tree is extensive, severe pruning may be necessary. Hemlock trees can withstand severe pruning and will recover from losing as much as 50% of their branches.
Pruning Hemlocks to Remove Competing Main Trunks
Upright hemlock varieties typically look best with only one main trunk. If secondary upright trunks start to grow, you may want to remove them to maintain the desired shape of the tree.
These secondary trunks can be pruned back to their starting point on the main trunk or cut at any point along the trunk to stop their upward growth and encourage side growth instead.
Additional Tips for Pruning Hemlocks
- Always use clean, sharp tools to prevent the spread of disease.
- Avoid over-pruning, as this can weaken the tree and make it more susceptible to pests and diseases.
- If you are unsure about how to prune a hemlock tree, consult with a certified arborist.
- Hemlock trees can be pruned at any time of year, but it is best to avoid pruning in fall and winter.
Conclusion
Pruning hemlock trees is a relatively simple task that can help to maintain the health and appearance of your trees. By following the tips outlined in this guide, you can keep your hemlock trees looking their best for years to come.
