fall arborvitae fertilizer
What is the best fall arborvitae fertilizer?
Certified GKH Gardening Expert
Usually I wouldn't recommend fertilizing mature trees, as they will get plenty of nutrients from the ground. If you still choose to fertilize, then you will want to use a general purpose fertilizer that is slow release so that you do not over-dose them with nitrogen too fast. Here is an article with more information: https://www.gardeningknowhow.com/ornamental/trees/arborvitae/fertilizing-arborvitae-trees.htm