How to get rid of fire ants near artificial turf without damaging it

Fire ants need soil to dig galleries, and turf backing and infill are not diggable soil, so colonies mound at the fabric edge, in planting beds next to the turf, in expansion joints, or under edging and pavers. Worker ants then forage out across the surface looking for food, which is why you will see ants crossing the fibers even though the colony itself is in the ground nearby, not under the turf.

Step one: bait. Pick a day ants are actively foraging, which you can check by dropping a small piece of food near a trail and looking back in twenty or thirty minutes. Broadcast a granular bait labeled for fire ants over the surrounding soil and bed areas, at label rate, when no rain is expected for a day or two so ants have time to carry it back to the colony before it washes away. It does not need to go on the turf fibers themselves.

Step two: treat visible mounds. Any mound within a few feet of the turf edge gets treated individually with a mound-specific product per label, applied from ground level, not through the turf.

• Digging into or chopping a mound near the edge. Loosens the soil supporting the perimeter and can undermine an edge or seam within reach.
• Boiling water or flooding a mound with a hose near turf. Often just moves the colony sideways under the edge rather than killing it, and repeated flooding erodes the base material the turf edge is secured into.
• A shovel, on principle. It rarely reaches the queen and it always disturbs ground the turf depends on.

A slightly raised or crumbly line running under a seam, sand or soil visible pushing up through seam tape, or an edge that has started to lift where it did not before are all worth a look before you treat anything. That is a repair question as much as a pest one, covered under turf repair.

On the Grand Strand, fire ants are most active foraging in spring and fall, when soil temperatures are moderate; they slow down in the height of summer heat and in the coldest snap of winter. Baiting in those spring and fall windows gets more of the colony than baiting in July or January, since bait carried back by fewer foraging workers treats less of the colony underground.

Bait takes days to work, since it relies on foraging workers carrying it back to feed the colony, including the queen, rather than killing on contact. Check the treated area after a week: a mound that has gone flat and inactive, with no fresh foraging trail across the turf nearby, is a good sign. A mound that looks the same or has simply moved a few feet over usually means the bait was not fresh, was applied on a poor foraging day, or missed the colony's main trail, and is worth a second round rather than a stronger, riskier product.

If a mound has already lifted or undermined an edge or seam, that is a repair, not a pest job: edge repair starts at $175 and seam repair at $250. If ant activity has left sandy debris tracked into the fibers, a normal cleaning visit clears it, starting at $199 for up to 500 square feet.