Which non-chemical approach can help suppress sedges in turf?

• A. Dense, healthy turf growth
• B. Applying broadleaf herbicide
• C. Over-watering
• D. Increasing mowing height only

Answer: (A)

Dense, healthy turf growth creates a strong competitive environment that makes it hard for sedges to establish. When the turf is thick and vigorous, it shades out potential sedge seedlings, crowds them for light, and uses water and nutrients more effectively, leaving fewer resources for weeds to take hold. Sedges tend to invade thin, stressed turf and bare spots, so boosting turf density through proper fertility, irrigation, and mowing practices reduces those vulnerable areas and suppresses sedge growth without chemicals.

Using a broadleaf herbicide is a chemical control and not part of a non-chemical approach. Over-watering tends to favor wet-soil conditions that sedges like, not suppress them. Increasing mowing height alone helps reduce stress but doesn’t by itself create the dense, uniform stand that truly suppresses sedges.