I am not sure if this is weed or something else. Everything that came up this year is from last fall's planting. Before that there was only grass. This thing is already 18" tall and almost 16" wide. There are 2. The only things that I had 2 of last fall that did not come up were allium and blue bells and I do not think this is that. Any suggestions would be good! Should I just remove them? Thank you!