Pruning a weeping cherry tree is less about hacking away at branches and more about guiding the tree's natural grace. This meticulous process ensures the signature cascading form remains healthy, while also improving airflow and light penetration to prevent disease. When done correctly, the result is a more vigorous specimen that showcases its dramatic trailing branches year after year.
Understanding the Weeping Cherry's Growth Habit
Before you make the first cut, it is essential to understand how these trees grow. Weeping cherries produce fruit spurs on older wood, and their weeping nature is a genetic growth pattern rather than a separate species. New shoots grow upward from the top of the arching branches, while the ends of the branches naturally weep downward. Recognizing this helps you distinguish between vigorous water sprouts that must be removed and the delicate, flowering branches that should be preserved.
Timing Your Pruning
The best time to prune a weeping cherry tree is during the late winter months, just before the sap begins to rise. Pruning while the tree is fully dormant minimizes stress and reduces the risk of bleeding sap, which can attract pests and diseases. Avoid heavy pruning in the fall, as new growth stimulated by the cuts could be vulnerable to frost damage. Summer pruning is acceptable only for the removal of damaged or diseased wood.
Gathering the Right Tools
You will need a selection of high-quality tools to make clean, precise cuts. Bypass pruners are ideal for cutting branches up to ¾ of an inch in diameter, while lopping shears handle thicker limbs up to 1.5 inches. For the largest branches, a pruning saw is necessary to ensure a smooth cut without tearing the bark. Long-handled pole pruners will help you reach higher branches without resorting to a ladder, which reduces the risk of damaging the tree or yourself.
| Tool | Use Case | Cutting Capacity |
|---|---|---|
| Bypass Pruners | Shaping, small branches | Up to ¾ inch |
| Lopping Shears | Thicker branches | Up to 1.5 inches |
| Pruning Saw | Large limbs | Over 1.5 inches |
Sanitization is Key
Never skip the step of sanitizing your blades. Wipe them down with a cloth soaked in rubbing alcohol or a diluted bleach solution before you begin, and again between trees. This simple practice prevents the spread of bacterial and fungal infections from one specimen to another. Clean your tools again once the job is finished to keep them sharp and ready for the next season.
The Pruning Process Step-by-Step
Begin by standing back and assessing the tree's silhouette. Look for branches that are crossing, rubbing against each other, or growing vertically straight up the trunk—these are known as water sprouts. These growths drain energy from the tree and disrupt the weeping pattern. Start removing these culprits first, cutting them back to the point of origin or to a main branch.
Next, address the "skirt" of the tree. Remove any low-hanging branches that touch the ground, as these are susceptible to soil-borne diseases and pests. When cutting back the main weeping branches, always make your cut just above a healthy bud or a side branch that is growing in the direction you want the tree to grow. This ensures the tree heals quickly and maintains its lush, full appearance without leaving behind stubs.
Thinning vs. Heading
Understand the difference between thinning cuts and heading cuts. Thinning cuts involve removing an entire branch back to the trunk or a main limb, which is the preferred method for a weeping cherry as it reduces bulk without stimulating excessive new growth. Heading cuts involve cutting a branch partway, which encourages dense growth but can lead to a bushier, less graceful shape. For a true weeping effect, thinning is the superior technique.
Post-Pruning Care
After the cuts are made, resist the urge to seal the wounds. Modern arboriculture has shown that allowing the tree to compartmentalize naturally is the healthiest approach for cherry trees. Avoid using paint or tar, as these can trap moisture and slow the healing process. Water the tree deeply a day or two before pruning and ensure it receives adequate moisture throughout the growing season to support its recovery.