Moved into nw house in summer.
Front garden is riddled with couch grass.
Dug it over and removed as much as possible, left to grow and applied glyphosphate once a week for 5 weeks. The surface is now barren but the root structure still dense.
My question is: Will glyphosphate destroy/kill the courch rhyzomes or will it resprout in spring.
The soil is heavily compacted and riddled with root so I was planning to rotavate. If the roots are killed off is this a safe and viable option to help me recondition the soil?