Altho I'm not new to growing flowers,I always thought annual ment exactly that. So,I'm buying new every year.Well,last fall, I brought in a petunia & a Gazania.(Gazanias are not cheap around here).Surprise--they survived. The petunia is still spindly, but it has a bud.The Gazania is blooming. Actually, it had several buds over winter, but I plucked them off, thinking the plant would then put all its 'energy' into producing a healthier, bigger plant.It looks fine now.Anyone else in colder climates do this? Does it work with other plants?