SRS, the basil I'm growing in my flower garden is a houseplant during the rest of the year. The variety is African Blue, and as long as I grow it in a big pot (so the roots never completely dry out) it grows and blooms all winter. Cuttings for summer beds are easy. I've had luck from taking cuttings of supermarket green basil in the spring, but I can't keep it over winter. I usually have a lemon verbena, too, but it's a bit hard to take cuttings from and outgrows any reasonable pot in a few years, so I don't have one at present. You could probably grow it outside, anyway. Like the rosemary, it's almost hardy.