Can't say for certain yet - but my male is 2 years old and still seems to be growing. Got him at 172 g and 3 months old - now he is pushing 1000 grams and is 51ish inches long. I feed a small rat (between 50-70 grams) every 8-10 days. Over the winter he would only eat about every 20-30 days and only gained a little weight. Now that he is eating every 10 days he is gaining weight rapidly again. He's about as big around as the cardboard insert in a toilet paper roll