"Yes, that's actually the purpose of it," she explains as they work a little more. "It regulates temperature and water so that plants can grow outside their natural climate. For instance, if you tried to plant a cactus out here in a garden, it wouldn't like the cold of winter. But theoretically, if you set up the greenhouse to mimic its preferred environment, you could grow one just fine. A couple of my seeds are like that. They'll need a climate that's different from this one if we want to have a chance of growing any."