You can breed all year round. My first group of girls start in october. My second group get started around january. My third group starts around march. Also keep in mind just cause your female hits the magic weight of 1200 grams doesnt mean she will breed. Dont push her. You would be better off waiting till she is in the 1500 gram range. Even if you get a 1200 gram female to breed it usually results in low clutch numbers. I dont breed my girls till they get over 1500. I like em in the 1800 gram range for first clutches