We have very large older Eucalyptus trees in our backyard. It is now mid November, and we had the trees trimmed prior to reading that hot weather is the best time to trim these trees. I want to give the trees some type of vitamins or something to prevent them from getting diseases or dying. What can I give them or do to prevent anything from happening to these beautiful trees.
Certified GKH Gardening Expert
If they are well established, they should be fine. Making sure you are caring for them as best you can is the best thing you can do to help prevent disease from getting in the pruning wounds while they heal. If you have not already read it, here is an article on their general care: https://www.gardeningknowhow.com/ornamental/trees/eucalyptus/tips-growing-eucalyptus.htm