Boxwood green algae

[baldone]

What is this green stuff on my Hartland boxwood. Will it hurt it and should I clean it off. If so how?

 

[BrianBay9]

Yes you can clean it off. Use a soft toothbrush and vinegar, then flush through with water when you're done.

 

[rockm]

It’s algae. Won’t really harm the tree. Means the bark remains moist constantly

You can remove it with a soft nylon toothbrush and water. However using a brush will also remove some of the bark possibly A LOT of the bark if you scrub too much

Since Harlandii boxwood develops old looking bark as a feature, you might proceed cautiously. Old Boxwood of most any type with deep textured bark has this issue.

 

[baldone]

Thank you