The answer to 'when to treat for fire ants' is that the best time to treat for fire ants is in the spring and fall when the ants are most active. Fire ants are a common pest in many areas, and treating them at the right times can help control their population and prevent them from causing problems around your home.
In the spring, fire ants become more active as the weather warms up. This is a good time to treat for them, as the colony is still relatively small and the ants are more vulnerable. Treating in the fall is also effective, as the ants are preparing for the colder months and are actively foraging for food and resources.