I planted a berm several years ago with Sumac on one end, hazelnuts on the other, and in between a lot of little bluestem seed and prairie clover. They sent me Canada rye seeds by mistake, and I've overseeded it with LBS and clover from my other locations on my proprerty as well as several pounds purchased, and tried overseeding fall, winter, and spring ever since. Years later, the rye has given up, the clover is in there( but virtually invisible), but no sign of LBS and its all overgrown with lawngrasses and thistle. I've tried burning, which the Hazelnut barely survived, and hand weeding, but nothing seems to work. Do I have to kill it all and start over?