If you plant anything else in the same area as crab grass it becomes overgrown by the grass. It is invasive to all areas of my large yard. I work very hard to remove crab grass from my Roses, Iris, Peonies, all annuals and more. I want flax and other plants to overgrow the invasive plant. I would rather have mint be my invasive. Mint has value as a repellant crab grass does hold the earth in place but it does require water and is in the meantime a pest in my opinion.If you live where you can get flood irrigation, it is by far the least expensive way to water your yard. Less than $100 for the YEAR. You will still have a water bill for that water that comes from the city.
I've never understood what is wrong with crab grass? Weeds that have stickers I understand being bad (I hate burr clover!), but grasses that simply don't happen to be the "preferred" species?