I'm in Ohio and have tried to overwinter some plants, including iris bulbs, outside in half whiskey barrels. The soil froze solid and nothing survived. This past winter, I was able to overwinter hybrid tea roses in similar containers by putting them in a shed on the west side of my house surrounded by insulating materials. Roses go completely dormant and are fine with no light and little water. I am in an area where the roses probably would have survived if planted in the ground. We had several cold periods, but I don't know if the soil froze. You might succeed with a plant like that.

Well I think I'll do a Dayliliy (Which Survived in a bucket of water of winter) in the Middle But need a Companion Plant Something low that will Flow over like Dianthus or Bugleweed. But have no Experience in Zone 5 or any other

Delete post. Sorry, I see you were looking for flowers, not fruit.

This post was edited by edweather on Fri, Jun 21, 13 at 12:59