Do Boxwoods Freeze and How to Prevent It

Boxwoods are a popular evergreen shrub, but they can be sensitive to freezing temperatures. They are hardy in USDA zones 5-9, but even in these zones, they can still suffer damage from extreme cold snaps.

In areas with harsh winters, boxwoods may experience dieback, where the leaves and stems turn brown and brittle. This can be a sign that the plant is under stress from the cold.

To prevent freezing damage, it's essential to mulch around the base of the plant. A 2-3 inch layer of organic mulch like wood chips or bark can help insulate the roots and keep the soil from freezing.

By taking these precautions, you can help your boxwood survive the winter months and thrive in the spring.

A different take: How Far Apart to Plant Boxwoods

Boxwood is a dense shrub that makes for an ideal front yard landscaping choice for foundation hedges and concrete patio areas.

Available in a wide range of growth habits, Boxwood can be tailored to fit your specific landscaping needs.

Check this out: Landscaping with Boxwoods

Some varieties of Boxwood can show browning foliage after a freeze, but most do not have any issues in colder temperatures.

Boxwood is a hardy evergreen shrub that can withstand colder temperatures, making it a great shrub to consider when designing your new landscaping.

It's worth noting that Boxwood can be a bit wilder in appearance than your typical pruned shrubs, but that's part of its charm.

Boxwood plants can be susceptible to frost or freeze damage when extreme weather events occur.

In the mid-Atlantic area of the United States, frost or freeze damage can occur in the fall from October through early November, or in the spring from late March through early May.

Running irrigation water over the plants during a cold event can minimize frost or freeze injury.

Frost blankets are specifically designed to be placed over plants during cold weather events.

The worst damage from a frost or freeze event occurs when temperatures get into the low to mid 20’s, especially during an extreme freeze event.

A fresh viewpoint: How to Prune Boxwoods with Winter Damage

The extent of the damage is related to the temperatures leading up to the cold temperatures, with the worst damage occurring with a very warm fall followed quickly by a severe and early frost or freeze.

In the spring, the worst damage occurs with a very early and warm spring fully pushing out the new growth of the boxwood, followed by an abnormally cold night.

To protect your boxwood from damage, consider using frost blankets or running irrigation water over the plants during a cold event.

In addition to these methods, burlap can also be used to insulate the plants and keep them safe from damaging winds, heavy snows, and freezing temperatures.

Some boxwood varieties can show browning foliage after a freeze, but most do not have any issues in colder temperatures.

Intriguing read: Can You Trim Boxwoods in the Spring

Boxwood growers have seen some of the worst frost/freeze damage in decades, with two abnormally late spring frosts in Central Virginia in 2020. This type of damage is common in the mid-Atlantic area of the United States, where temperatures can drop below 30 degrees Fahrenheit.

Frost or freeze damage can be minimized by running irrigation water over the plants during a cold event. This can help prevent the "burning" of the most tender foliage, usually the tips of the newest growth.

Boxwood are typically hardy evergreens that can tolerate cold, but extreme weather events can cause injury. The extent of the damage is related to the temperatures leading up to the cold temperatures, with the worst damage occurring with a very warm fall followed quickly by a severe and early frost or freeze.

In the spring, the extent of the damage is related to the development of the new growth in the boxwood, with the worst damage occurring with a very early and warm spring fully pushing out the new growth of the boxwood, followed by an abnormally cold night.

Frost blankets are a great way to protect tender boxwood from cold temperatures. These blankets are breathable to prevent diseases, but warm enough to protect the plants.

Boxwood can show browning foliage after a freeze, but most varieties do not have any issues in colder temperatures. Some varieties can be susceptible to injury when extreme weather events occur.

Broaden your view: How to Protect Boxwoods in Winter

Pale- to straw-colored, desiccated foliage and branch tips are common signs of frost or freeze damage. Fresh young shoots are especially susceptible, and an extreme freeze event can cause splitting of bark, resulting in dead limbs.

Early spring or late summer pruning or shearing can stimulate new shoots that will get damaged if there’s not enough time to harden off before a frost or freeze.