It is best to wait until she is around a year old or so, bring the female over to the males cage and watch her reaction if she stays a calm peach or pink color and doesn't gape, hiss rock back and forth and turn dark colors she is probably receptive and you can put her in his cage. She should slowly walk away while he follows, he will do his head bob, show off colors, follow her and mount. If she freaks out then put her back in her cage and try again in a week or so they will lay eggs one month after when bred, when not bred it depends.