Big mistake with arborvitaes
I have two arborvitaes on either side of my Garage, and though they are 6 foot tall and growing, one of them was getting slightly copper/brown in color. After having a casual discussion with my neighbor, I thought of putting one Miracle Gro evergreen spikes. Biggest mistake. Now, both of my trees are about 60% brown within 2 weeks of putting those spikes down.
Anyone has any idea what happened here, or anyone who has used these damaging spikes with different experience?