Thistle looking plant from hell I had like five of these in my field last year. Now I have 50. These are about 6 feet tall currently, I remember that they got even taller last year (like 8 feet probably). They grow a flower on top. They are very pokey. Are they a thistle variety? I’m gonna cut them at the base before they flower. Invasive? Location: central Indiana. Originally by u/NorthernWolfhound on Reddit: https://tinyurl.com/2dnh9wd4