Yes mate, you can. But try to keep them as dry as possible (especially over winter). Orientate the enclosure for plenty of morning sun. Provide plenty of cover and free draining substrate so it doesn't get boggy during extended periods of rain. And keep it clean of shed skin and faeces (as much as possible anyway). You may need some wire over the top to protect them from predators as well. I have lost a few animals to hawks and foxes.. Wall height needs to be about 900mm.