Do I Need to Feed 20 Year Old Arborvitae?

Question

Do I need to give an annual/spring feeding to my row of arborvitae that were planted 20 years ago? If so, what would you recommend?

Answer 1

Mature trees are more equipped to resist disease, pests and fuller, dense foliage than younger ones, so fertilizing shouldn't really be a concern for yours unless it is beginning to show signs of stress. As long as it looks healthy, I would simply let it be.