Add Yahoo as a preferred source to see more of our stories on Google. Comfrey earned its "invasive weed" reputation from one variety that spreads aggressively by seed, but the type most gardeners ...

Comfrey earned its “invasive weed” reputation from one variety that spreads aggressively by seed, but the type most gardeners actually grow for fertilizer, a sterile hybrid called Bocking 14, doesn’t ...