The answer to 'when to treat for ant control' is that the best time to treat for ants is in the spring and fall when ant activity is highest. Ants typically become more active as the weather warms up in the spring, and they start preparing for winter in the fall. Treating during these peak activity periods helps eliminate ant colonies before they can fully establish themselves and cause problems in your home.
It's important to treat for ants proactively, rather than waiting until you see a lot of ant activity. Ant colonies can grow quickly, and by the time you notice a major infestation, it may be more difficult to get rid of them. Treating in the spring and fall, when ants are just starting to become active, allows you to get ahead of the problem and prevent a larger infestation from developing.