Eric Hanson wrote:
The most difficult weed for me though is Johnson Grass. The stuff is incredibly resilient! It grows by rhizomes and by seed, so it spreads easily. I am pretty sure that it is a C4 plant as it grows very fast, thrives in drought. And I really mean it THRIVES during drought periods. Every other grass will turn yellow and then brown, but Johnson Grass is green and lush. Mowing slows it down, but I have no idea how to get rid of the stuff.