Black leaves on arborvitae.
We planted 22 arborvitae to block a neighbor, about one month ago. They seem to be doing great, although my husband used Miricale Grow thru a sprayer and now five of the trees have black leaves. Is this fixable or will these trees die?
Saratoga County New York
Thank you for your question. Without photos and some information about how these were planted or their subsequent care, we can’t diagnose what is wrong, whether there is a cure, or their fate. Perhaps your county Extension service is able, with more data, to identify the problem(s);and help with a solution. Here is their webpage: http://ccesaratoga.org/contact Good luck!