My neighbor has a patch of lilies that grow between our garages.She does not use the internet so she asked me to help her find an answer. The vine pictured is overtaking her flowers. She tried digging the roots up last year and I think it just made the vines angry. They are stronger than they have been before. The roots go deep in the ground, some she dug out last year actually crept under her garage foundation. She's tried to organically remove them and cut them back, but nothing is working. Any suggestions would be much appreciated. Thank you.