i have just planted over 800 tree starts and covered them with cages to protect against deer!! I cleared the land as best i could with tractor and brush hog but live on ahill that previous owners logged and left stumps but never replanted. Alot of vines and scotch broom was laid down but not removed, due to weather and the fact that the ground is so soft that i kept getting tractor stuck in the mud! (boy did those stumps come in handy getting the tractor unstuck with rigging lol) The question " how to kill the sticker bushes ie blackberrie vines and scotcgbroom without killing trees with a herbicide?" specifically what herbicide will kill broadleaf vines and not kill fir tree starts?????