I'm raising hissers and they are on 4th molt and are smaller than adults but males already have horns! But they all still have white stripes so I'm guessing they aren't fully grown but at this rate I think they will be giant morph!I studied a few of my nymphs for a while, and they all ended up as a sub adult on their 5th molt. Maybe an excess of food and heat would make them an adult on their 5th molt.