It wasn't my brilliant idea to plant these things... they were already here when we moved in... I do not want them, I don't like them, I don't think they smell very good, and they're quite poisonous to animals.
I tried to dig them up in the Fall, and now come spring they're starting to sprout again. So I got out the shovel and tried to do a very thorough job of digging them up this time. They were barely even beginning sprout, yet holy smokes did these things ever have MASSIVE roots!
I went through the soil with my heavy duty shovel and tried to dig up every root and tuber I could find. I'm wondering if it's safe to plant anything else in that spot, because I worry that if I try to plant anything there, the daylilies will start popping up AGAIN and strangle it. I wanted to put catnip there, and even though catnip is also a very tough plant with big roots, I have the feeling it would lose in a battle against these things.