Definitely make up a batch of bone salve (
https://permies.com/t/1805//Sepp-Holzer-recipe-animals-trees). I made some this winter in a roasting pan set we found at a thrift store (much like this one

). We used clay from the dollar store to seal it, and a scrap piece of fencing to hold the bones to the top half of the pot. It was all together quite cheep, and not as hard as I thought it would be!
I used old chicken and beef bones that had been in my freezer for waaaaaay too long. It made some really thick paste that I have to add water to. I use a paint brush and apply a few dabs to each branch. So far, I've only had one bite on my apple trees (last year, before the salve, they were mostly destroyed by deer). The salve is cheep and easy to apply. I even applied it to my thimbleberries and raspberries with no problem.
As for herbaceous plants, the salve probably wouldn't be good idea. Hopefully someone else has a good idea!