Boxwood shrubs are broadleaf evergreens that grow upright. They can grow in shade or in sun and can live as long as 300 years if diseases are identified and addressed. The plant produces small flowers in the spring.
Phytophthora Root Rot is a fungal disease. English boxwood decline is a fungal disease that usually attacks plants over 20 years old. Volutella stem blight is a fungus disease of the twigs and leaves.
Phytophthora root rot causes leaves turn light green then yellow, bronze or straw colored. The leaves also turn upward, and the margins roll to the inside. English boxwood decline has the same symptoms. With Volutella stem blight, the leaves on the tips of the twigs will turn orange or bronze in early spring. Twigs will die back.
Phytophthora root rot is caused by too much moisture from over-watering or heavy rains. English boxwood decline happens when the plant suffers stress from a drought situation. Volutella stem blight usually occurs when the plant has been damaged during the winter, usually by frost.
Phytophthora root rot can be prevented by planting in well-drained soils or on a raised bed. English boxwood decline can be prevented by giving the plant a deep watering during drought on a regular basis. Volutella stem blight can be prevented by proper mulching.
With Phytophthora root rot, seriously infected plants should be removed and destroyed, and the soil should be drenched with fungicide. With English boxwood decline, there is no treatment. New plants should not be planted in the same place. There is no fungicide for Volutella stem blight, but if the damage is not severe, the plant will grow new leaves.
- Boxwood Facts
- Boxwood Diseases
Boxwoods, Hedges, Shrubds
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Regina Sass has been a writer for 10 years, penning articles for publications in the real estate and retail industries. Her online experience includes writing, advertising and editing for an educational website. Sass is a member of the Society of Professional Journalists.