The best way to combat boxwood orange/yellow rust fungus (my terminology). - Ask Extension
What are the most effective procedures and products for combating the orange fungus on boxwoods?
Knowledgebase
The best way to combat boxwood orange/yellow rust fungus (my terminology). #927667
Asked April 06, 2026, 2:55 PM EDT
What are the most effective procedures and products for combating the orange fungus on boxwoods?
Anne Arundel CountyMaryland
Expert Response
Can you share images of the symptoms you're describing? Boxwood doesn't get a rust fungus, and the main cause of leaf orange coloration is due to feeding damage (often combined with winter injury) from Boxwood Leafminer, an insect. Management for common boxwood ailments are included on the linked page.