The interval between fertilizer applications may be increased by applying a slow release fertilizer. Weed Control Apply postemergence herbicides as needed to control summer annual and perennial broadleaf weeds such as knotweed, spurge, and lespedeza. Two applications 5 to 7 days apart are required for effective annual sedge and crabgrass control. Dallisgrass requires five applications of MSMA 5 to 7 days apart. Apply herbicides only when weeds are present, the grass is actively growing, and the lawn is not suffering from drought stress.
Several manufacturers offer winterizing fertilizers with various combinations of nutrients.
Watering Follow the March through May irrigation guidelines. Dormant bermudagrass may need to be watered periodically when warm, windy weather prevails Weed Control Apply preemergence or postemergence herbicides as needed to control winter annual and perennial broadleaf weeds such as chickweed and henbit. Preemergence herbicides do not control existing perennial weeds. Apply postemergence herbicides only when weed are present. Do not apply herbicides designed to control annual bluegrass if the lawn is to be over seeded with ryegrass.