THE LEAFLET

As we kick off 2025, a fresh blanket of snow graced Washington, DC last night, adding a picturesque charm to the cityscape. While the sight of snow-covered trees is magical, it also serves as a reminder of the importance of tree care during the colder months. Proper care ensures the health and longevity of your trees throughout winter and beyond. Here are some tips to keep your trees healthy this season.

Remove Invasive Plants

Winter is an excellent time to remove invasive plants or vines growing around your trees. English ivy, wisteria, porcelain berry, and other invasive species compete with trees for water and nutrients. These plants can cover branches, block sunlight, and weaken the tree, making it more susceptible to pests and breakage.

Remove these invaders by hand, being careful not to damage the tree’s bark. Wear gloves to protect your hands, and check out our Invasive Series, Most UN-Wanted, for more information on managing problematic plants.

Mulch the Right Way

Apply a 3 to 5 inch layer of organic mulch, such as wood chips, starting a few inches away from the tree trunk and extending outward in a circle. Avoid piling mulch against the trunk (no “mulch volcanoes”), as this can lead to moisture retention and trunk decay. Instead, aim for a “donut” distribution to promote healthy root systems. For detailed guidance, revisit our Mulching Do’s and Don’ts article.

Prune Strategically

Winter dormancy makes this an ideal time for structural pruning. Prune young trees to establish strong frameworks and reduce the risk of limb failure in high winds, snow, or ice. Proper pruning also minimizes future damage and maintenance needs.

While our how-to pruning videos offer great starting points, it is always recommended to consult a certified arborist for significant pruning tasks or concerns about specific trees. Arborists can provide expert assessments and help keep your trees in top shape.

Water Wisely

A common question in winter tree care is: How often should I water my tree? Dormant trees require less water than during the growing season. However, when there is minimal snow cover or precipitation, plan to water your trees once or twice a month until spring leaf-out. If your site is particularly windy, you may need to water more often. Water only when the temperature is above 40°F and the ground around your trees is free from snow and ice. Water early in the day so the trees have time to absorb it before temperatures drop at night. Resume your regular watering schedule once the ground thaws in spring. Visit our watering page for more tips and resources on how to properly water your tree.

Appreciate Winter’s Beauty

Take a moment to enjoy the serene beauty of your trees in winter. Snow-covered branches create stunning natural sculptures, highlighting the intricate architecture of their structure.

By following these tips, you can ensure your trees thrive through the winter and are ready to flourish in the spring. Happy New Year, and here’s to a healthy year for you and your trees!