Some of my very old boxwood bushes split in half during severe storms. What can I do to preserve them, if possible?

Answer

You will need to observe and assess all your damaged boxwood as the growing season resumes. Some may spring back naturally, but others may need to be replaced, have the damaged stems removed or be tied up to hold their shape.

Winter damage of boxwood from snow and wind is common. The delicate branches are broken easily if heaped in snow and they are not a good plant to place under the roofline of a house in an area that receives heavy snowfall. When you plant boxwood, the siting of your plants to replicate the protection of its natural habitat from wind and strong sun is critical. Taking winter precautions to protect your plants is important.

These evergreen plants will continue to photosynthesize for an extended period, and even on occasion during the winter, but will be challenged to take up the necessary moisture from the dry or frozen soil.  Wind blowing past the leaves will speed up evaporation creating even dryer conditions and a great stress on the plants.  The use of burlap fastened to stakes to create a wind break for the location is an excellent idea. You may not want to wrap the shrubs too closely with burlap or their access to sunlight will be restricted. Wrapping completely should be considered, however, if your shrub is in a position that is likely to be subject to forceful deposits of snow from a roof ledge, snow plow or other source. Otherwise, brush off heavy snow that settles on the plant to avoid crushing injuries.

If the boxwoods are near a path or roadway that is treated with salt in the winter, positioning the windbreak to also prevent salt spray on the plants will  increase their chance of making it through the winter in good health.  Use plant-friendly ice-melting products on your own property.

Take measures to see that boxwoods are watered until the ground freezes and during any warm breaks in the winter weather. Check that mulch has not drifted up to the leafy base of the shrub where, along with the dense leaf structure, it can make a cozy nest for rodents that will strip the bark from the shrub and may kill it.

For more information on all aspects of caring for boxwood, please see our Guide to Boxwood.

This article from Morton Arboretum provides a great description of the winter injuries that woody plants suffer in cold  climates: Winter Injury to Trees and Shrubs

For tips on a variety of gardening topics, see our Plant Information Guides.>

- Courtesy of NYBG Plant Information Service

  • Last Updated Feb 03, 2021
  • Views 2033
  • Answered By Anita Finkle

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