Susan, even in zone 8 you think a garage may be too cold? Do you know how cold they can tolerate? It gets pretty chilly in that unheated room. I did lose some Coleus in there one winter, but we had had an ice storm that knocked out our power for 8 days too, so it's not the norm for it to be that cold in there. The Coleus were the only things I lost, and come to think of it, the orange one was in there that year. I would like to have a better idea of what's risky, though, just in case I get over confident and kinda lazy some future fall, when I'm dreading dragging everything back in, LOL.
I read info from a couple of sources saying Clivia like a cooler, dryer period in winter, and that promotes flowering. Have you found this to be the case?