Last year I bought some food that I was told was specific for Arborvites – I did not save the bag, but this year the clerk gave me an organic for fruit and shade trees – instructions do neot mention the arborvite tree.
You’d think that Holly-Tone, the evergreen food, would be the correct choice for arborvitae. However, Arborvitae are an evergreen that, unlike most other evergreens, does NOT prefer acidic soil. Holly-Tone contains sulfur, a soil acidifier, so it is inappropriate for Arborvitae. The correct choice is Tree-Tone, which has no sulfur added. You are correct though, no mention of Arborvitae is made on the Tree-Tone bag even though it is the correct food them.