@Tarev - that should work. Us folks in cold land usually dig em up and store like canna or dahlias. In your garage should be fine. Might want to give a very small drink once a month or so. I store lots of things in my garage which sometimes gets to near freezing. Last winter I stored deck planters with Geraniums and Calibrachoas. Both would perish outdoors here and are treated as annuals, though most people take cuttings of geraniums.
With your cold/wet winter they would likely rot outdoors.
BTW, if you grow Coleus, they can be over wintered indoors as well. Most people don't know that, thinking they are "Annuals". Like most "annuals" they are perennials.
