I don't have a garage ..... but I do have a shed (I live in a Mobile home).
I put my Wisteria bonsai in the shed last winter in a box with the pot wrapped in bubble wrap.
The ceramic bonsai pot cracked and broke, and the wisteria bonsai died. Probably because the
roots got exposed and the bonsai died of the cold. I don't know how a Lily bulb will do in the shed,
and I wouldn't know how to wrap it. Any ideas ?
