I have issues with the weevils too. Most of mine are in pots. I'm going to treat this spring for those guys. These plants are a bit expensive. When I suspect weevil I dig it up and look. If I find the weevil then i cut all the rotted root and replant the part that is left and clean. Not sure if I expained that right. If you cut all the stem and root of that the weevil ate then sometimes it will root and survive.
FQ is a hard one to lose, its one of my favorite of all the heuchera.
