I'm treating a pervasive patch of Canada thistle with Home Depot's HDX and it is finally dying after several applications.
1. Do I need to reapply the HDX after each rain? We have had so much rain that I'm not sure if an application is going to be effective so I've been reapplying after a rain which is very time consuming and expensive. It takes 7 to 14 days to be effective and I'm not sure it's working since it's been rained on.
2. What do I do with the (seemingly) dead plant? Is it actually dead all the way to the root end? Do I pull it out, cut it off at the ground, or just let it lie? Will it regenerate if I don't get the root out?
Hennepin County Minnesota