I have a customer with a neglected bed that really needs a complete redo, but she doesn't want to spend the money. Lots of lyriope, roses, and iris bulbs throughout the bed to save. I usually do the gly on a paintbrush, but there are an absurd number of weeds in this bed to do that. Any recommendations for something I can spray over the top? Or should I just put my foot down to redo the whole thing?