don't know about you attic, just make sure it doesnt get too warm in the very early spring, don't want them to break dormancy too soon, but other than that it should do great .
mayby one of those remote temp devices with the transmitter near the plants, and reciever near your every day hot spot in the house, say next to the coffee.
Mine stay out of sun also, on the north side of the house to help with over heating issues
Jimmy
Jimmy