So sorry it's taken so long to get back to you.* We've been involved in major renovations at the house and there just doesn't seem to be enough hours in the day for me to do everything.* :?*
These days it's not recommended to cover a wound in the bark of a tree as it can give a place for insects and diseases to hide and grow.* Different trees compartementalize wounds at different rates.* Some do better then others.* Unfortunately the list I have does not list the Leyland cypress aka Cupressocyparis leylandii or any of the cypress trees.* Here's the list if you'd like to keep it for future reference.* :)
I would suggest a ring of mulch around any trees or shrubs where your hubby is likely to use his 'toys'.* ;)
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.