- 1). Pull stilt grass from your lawn. It has shallow roots, so it's easier to pull from the ground than other plants. Work when the soil is moist to make the process even easier. The best time is in mid- to late summer because the grass is taller and has more branches. Continue to pull it through the rest of the season.
- 2). Apply a systemic herbicide that contains glyphosate. Glyphosate is a nonspecific herbicide, so it will kill any plant it comes in contact with. For that reason, spray it directly on the stilt grass, taking care not to let the spray get on the neighboring lawn.
- 3). Spray a pre-emergent herbicide containing imazapic in the spring. Use 4 oz. per acre, spraying it all over the lawn with a flat fan nozzle. You can reapply as needed through the germination process.
- 4). Mow stilt grass in the late summer, between August and September. This is when it is flowering, but before seed is produced. Cutting the annual down late in the season will keep it from regrowing the same season.
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