Males can be sexually mature at six months or so in captivity. Not much needs to be done, just make sure he's healthy. A cool period or even brumation before trying to breed the snakes increases the chances that they will do so, but it's probably concerns the female more than the male.
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That depends on when you want to breed them. They're ready to go immediately after brumation. Not so sure about how well it works with just a cooling period.
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My T.marcianus were just cooled down for the winter months. i keep my males seperated from the females. I watched the temperatures of Texas and Arizona.
As for me my set ups are in the basement of my house, a temp of around 80f normally. I let the temperature naturally drop to 60f and shortened the daylight time. They seem to naturally seek a cold constant area and burrow down. I continued to feed them sparingly if they wanted to eat. springtime raise the ambient temperature and their peromones and pinal glands do the rest.