Boxwood problem

[Jmm]

Any idea what's wrong with my boxwood and ageratum and how/if I can fix it?

Thanks!

 

[LIcenter]

Possibly Boxwood blight. Privets are also susceptible to this problem.

Since boxwood blight cannot be effectively controlled once the infection begins, prompt removal of any diseased boxwood is recommended to help prevent spread of disease to healthy plants. Associated leaf debris should also be removed. Be aware that removing diseased boxwood and leaf debris will not eradicate the boxwood blight pathogen from the location, since the pathogen produces long-lived survival structures that can persist in the soil for 5 to 6 years

https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/PPWS/PPWS-29/PPWS-29-pdf.pdf

 

[Jmm]

Thank you. Is that what's affecting the ageratum as well? Or is that unrelated?

 

[LIcenter]

Thank you. Is that what's affecting the ageratum as well? Or is that unrelated?

That I couldn't say. Fungus/blight might affect some plants, and note others.