Why are my boxwoods turning brown?

Houston is known for its heavy clay, poor draining soil. Add some humidity in and we’ve got a perfect storm for boxwood blight.  So what is boxwood blight and how can we stop it?  Here’s what you need to know.

Understanding Boxwood Blight

Boxwood blight is a fungal disease characterized by tan-colored dead branches and twigs.  Korean, English and Japanese boxwoods are most susceptible to infection, but other shade-loving plants may be affected too.

Is There A Remedy for Boxwood Blight?

Boxwood blight is easily spread from infected plants ~ either plant to plant, or by coming in contact with tools or clothing that carry the spores.  There is no cure, so removal of the infected plant is important.  Disinfect pruners after removal.  You can dip them in a solution of nine parts water and one part bleach for 15 seconds and then allow them to air dry. 

To prevent boxwood blight from spreading to nearby plants, you will likely need to apply a fungicide. This will help suppress system development when applied to the front and back of leaves. 

Another strategy to prevent boxwood blight is to remove lower branches and leaves, exposing the base of the plant to promote airflow and allow for leaves to dry more quickly. 

Garden Girls’ Preferred Boxwood Alternatives

Garden Girls go-to alternative to boxwood is a compact holly, which shares the same look as boxwood, but performs better here in Houston. Another substitute for boxwood is the Copper Glow box honeysuckle, which is an Evergreen disease-resistant shrub.  It grows well in full sun to part shade.