Now that the usual spring weeds (like clover, chickweed, etc) have been controlled by all of the great lawn care herbicide products available on the market, we are left with lush and thriving fescue lawns. BUT WAIT! We still see some areas of "different" grasses growing in our deep green fescue lawn.
Unfortunately, we still have grassy weeds that cannot be controlled by a selective herbicide that won't also kill the good fescue grass. Here is a list of the most common we are seeing right now.
Poa trivialisPoa trivialis is a perennial weed that will come back each year. It stands out in fescue lawns as a lighter shade of green and grows a bit faster/taller than fescue. It favors shady and moist areas. Seed from this weed can lay dormant for years and germinate when conditions become favorable and there is low competition. The best treatment for these patches of weed is to apply Round Up to the plant and replace with new fescue sod.
Annual ryegrass usually is the result of using hay straw during the fall season when mulching a newly renovated turf area. This weed is a light shade of green and quickly grows taller than fescue a day or two after mowing. Annual ryegrass will die off as we get into hot temperatures in May/June. Its best control is to mow it frequently so it does not produce new seed heads and let it die off on its own.