I've been cruising the internet for info. on overwintering my figs, bananas, and brugmansias and haven't really found a whole lot of good detailed instructions on overwintering for zone 4. Yes, the garage is insulated, but it's not attached to the house. So, I'm wondering what I would need to keep my plants alive in the garage in a dormant state? Blankets? Bubble wrap? Please tell me what works for you.