Over the spring and early summer the Pampas grass was fed some Roundup (several feedings required). The goal was to remove the 3-4 of these plants! Root mat removal was an almost humorous effort. I used a Honda 110 Tiller on the first root ball with good success! Emboldened, i moved on to # 2! The second was quite different. The tiller removed the 2" of stubble but at the root mat the tiller was jumping at least a foot up into the air, as it just bounced off the very solid matte of roots. I tried going outside the edge of the mat and backing in. "Sorry Son, I'm not going anywhere". Went to the trusty pick axe. first few swings bounced off the matte as well. Going into absolute full swing mode broke through at least some of the roots. Next step: Sharpen the pick axe and tackle it again. What a plant! I think going around the edges to undercut the monster may be a useful trick. Has anyone tried the root removal compounds, or epsom salts, which are said to decay roots?
That was after I set fire to it ..twice.Guess what's grown in its place???Incidentally, rumour has it a Pampas used to be a sign the owner was a swinger