How frequently can you apply frontline to your dog?

Frontline plus can be safely used every2-3 weeks if you have a flea problem. make sure that if you are going to bathe your pet you do so either 2 days before or after application. make sure to apply it directly to skin. Frontline will kill all fleas that get on your pet. if you are seeing a lot of fleas still after applying you need to treat environment.