Kill the mound and protect the ground with the Ortho Two-Step System for Fire Ant Control. Ortho Orthene Fire Ant Killer1 kills the queen and destroys the mounds, killing in as little as 60 minutes. Use this fire ant control product on lawns and around ornamental plants, including flowers, trees, and shrubs. Ortho Fire Ant Killer Granules protect your lawn from fire ants for up to 6 months and keeps new mounds from forming. To use, first treat individual mounds with Ortho Orthene Fire Ant Killer1, using the application rates on the label. For best results, apply when ants are active, and do not apply during heavy dew or just before heavy rain. Next, apply Ortho Fire Ant Killer Broadcast Granules using a Scotts drop or broadcast/rotary spreader. For best results, apply when ants are most active (morning and late evening) and temperatures are between 65 °F and 80 °F. Water in after application. One 12 oz. bottle of Ortho Orthene Fire Ant Killer1 treats up to 162 mounds, and one 13 lb. bag of Ortho Fire Ant Killer Broadcast Granules treats to up 5,650 sq. ft.