My Grapevine leaves have brown spots on them. How can this be corrected? What kind of food can I give the vines?
Certified GKH Gardening Expert
This could be a number of things--too little or too much water, over fertilizing, leaf scorch, etc. I would recommend using a slow release fertilizer, like Osmocote, on it during the summer to make sure it gets enough nutrients. This article has more information: https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htm