I won't profess to be smart, just experienced. I am not sure I would put it into a garden, after all, it is a weed for a reason. I guess if you are going to control it, it wouldn't be so bad. Hubby, being the smart as- that he is just told me that if you want Monarchs, Milkweed is their thing. Ha. Oh well, if it is an informal garden I guess a milkweed or two wouldn't hurt. Sheesh, why do I always give in to him?