We have an Iris bed at our vacation home that over the years has become inundated with “quack” grass. Is there a chemical control that would spare the Irises and eliminate the grass. If not, what would be our best recourse to gain control of the beds? Clay soil, pulling the grass in not effective.
Ugh…that’s a nasty problem. Possible the only sure fire approach would be to remove al the iris tubers and making sure that there are no quackgrass roots clinging to them and set them aside and then treat the area with RoundUp plant killer. Once the quack grass is dead, replant the iris. HERE’S MORE on quackgrass control in beds and gardens.