At a minimum you need 2 males / one female...but If you want true success 4 males to 2-3 females. Do you research first though. This isnt an easy frog to work with at all. Keep in mind once you have the eggs...proper care for the eggs....and EVEN WORSE the tadpoles...you will need several other smaller tanks for proper care of the tadpoles and MANY hours of time to work with them. This isnt a joking matter. Be responsible and get the materials and research months before breeding. Proper quarantine of your new frogs is the utmost importance.