Im clearing a site about 45 acres and its thick thick thick Texas purple sage along with some huestach and some other thorny pokey trees. My own personal property was the same years ago but after a few years I dont have any of that stuff growing well maybe a few spots, but 99% of it is gone. I told them they needed to hire some pros in this area, they want to be doing some Tifton 59 I think grazing hay for horses with in about 3yrs. So im not sure if there is another product besides Spike 80df or Spike 20p that will due the job.. And the option of buldozing the area and scraping it with a maintainer is a no go option, They were already doing it and didnt like all the brush piles. So were mowing it all down.