After my Chinooks failed to produce shoots this year, I investigated (I dug them up) only to find my crowns infested with maggot looking vermin. So sad. I was really looking forward to some hearty plants this year. So I invested in 2 magnum rhizomes and 2 cascade rhizomes. It helps take the sting out of the other failed crown. Anybody else have and issue where those little maggoty looking critters are eating their way through their crowns before?