Q.Killing English Ivy On Trees
We have English Ivy covering the trunks of about 6 very old and healthy Oak trees in our yard. About every 2 years I remove it by cutting the stem at the base and pulling the long strands off the bark. Once this is done, is there something I can get, like a spray or liquid, that can be put at the base of the tree to keep the Ivy from starting its climb again? Something that won’t hurt the trees.

Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/groundcover/english-ivy/kill-english-ivy.htm