GanjaGod: They can be moved, but I am not sure where. I am a teenager starting my first grow, so I am trying to keep the plants hidden, you know. I have 2 seedlings in a tray with a dome overtop, and I am just curious as to if they would survive overnight. No, I am not growing in a greenhouse and I do not have a way to keep them heated. I could move it to my shed, but that puts a risk to getting caught.