Fall is a great time to be outside in the lawn in Oklahoma, with the cooler temperatures, bright blue skies, and changing fall colors. Lawncare changes in the fall, from fertilization to weed-control, at least for bermudagrass and zoysiagrass lawns. We are done fertilizing warm-season turf such as bermudagrass, as it is shutting down and preparing for winter dormancy. It is a good idea to raise your mowing height some with your soon to come final mowing of the season for bermudagrass and zoysiagrass. A thicker layer of dormant turf helps to insulate the crown and root system of the turf over the winter, protecting it from possible winterkill. Thick turf also helps to prevent winter weeds from germinating to a certain extent. The main focus in mid to late fall is to apply pre and post-emergent weed-control to warm-season turf, which prevents or controls winter annual weeds such as henbit, poa annua, chickweed, and dandelions from taking over next early spring.
Overseed Fescue Lawn NowCool-season turf such as fescue is cared for totally different than bermudagrass. We do not apply a pre-emergent herbicide in the fall, since most fescue is overseeded in the fall. So our emphasis see fescue mowed high in the fall. This is one time of the season when a homeowner can mow both bermudagrass and fescue at the same height, about 3” or even more.
It won’t be long until the leaves start falling in Tulsa. Allowing leaves to accumulate on fescue that has been seeded in the fall will damage new seedlings. So do invest your time, or money in some cases, in picking up those leaves on a consistent basis later this fall. On warm-season turf, having leaves off of the turf allows us to get a better liquid weed treatment, so do help us out with that also.