Cut the leaves off and you have nothing to take in the herbicides….but that in itself might take care of the weed.Would you mow it before you sprayed or after. I live in east Texas,
Definitely don't shred. It's best to spray plants that have not been stressed by shredding or any thing else for a couple years prior to spraying. Then, after you spray them, leave them standing until they break over naturally. They are not truely dead until that happens.Little bit of everything, mostly weeds berries vines and poison ivy just name a few, and yes there are a few woody plants
The good stuff will require an applicators license.
I think it depends on the weed and the herbicide. For instance, if the herbicide is 24D, then you want the plant growing well (not necessarily P and K, but definitely N).I like to spray herbicide first then fertilize a couple weeks later. I don't want to feed the weeds.