I have had a potted sego for about 15 years. Last winter I put it in an unused bedroom with the heat vents shut as I had done for most of those years. The plant was great outside, but grew too big for any place in our house's living space. So the bedroom had lower temp, probably around 60 degrees, and I would not water it much at all. This last winter I did not water it at all, basically forgot about it. I went up to the bedroom one day in early spring and discovered all the fronds were brown. I thought. well it's been a good run, so I put it outside and planned to throw it out. I cut all the leaves off first and then thought, I am just going to leave it, water it a little, and see if it comes back. It did! Like all the way back, 11 new fronds. I believe the sego palm is one tough plant.