My aspen is really looking sick. It was fine thru July and then started turning black. Would you take a look and let me know what you suggest? It’s definitely not a watering issue.

The leaf blackening is caused by a non-lethal fungal leaf disease called marsonina. It is usually a problem seen in the spring, when the weather is wetter, and leaf tissue is undefended by its waxy cuticle. Marsonina will grow like crazy after a wet summer. There are many aspen trees across the city with this mostly unpredictable disease.

We Can Help

Our team of ISA Certified Arborists and Board Certified Master Arborists are standing by to assist with any issues you have with your trees. Contact us today to schedule an assessment of your trees.

Photo credit: Jason Rathe Field Outdoor Spaces