The answer to 'how often for flea control' is that most experts recommend treating for fleas every 4-6 weeks during flea season, which is typically spring through fall. Fleas can reproduce rapidly, so consistent treatment is crucial to break the flea life cycle and keep your home pest-free.
Flea eggs can hatch in as little as 2 weeks, so monthly treatments are generally required to eliminate an existing flea infestation. Once the infestation is under control, you can typically switch to a preventative treatment every 4-6 weeks to maintain protection.