How do you deal with invasive grass?
Due to work and illness my garden has not been fully planted in a couple years and has consequently been over taken by a grass that spreads by long roots/runners. The roots are as thick as heavyweight thread and I have pulled out some that are 10 feet or longer. I've tried black plastic and other mulch to smother them, but that only seems to encourage the runners until I have massive mats of roots. Tilling only spreads the problem. I don't want to use any chemical sprays as I have never used any non-organic chemicals or fertilizers on this property, but I really need to get rid of this grass. Suggestions?