Where Do I Grow Sedum “Sea Urchin?”

What do you do when you get conflicting information on a plant?

This is  Sedum “Sea Urchin” that I have planted in an inside planter sometimes for the winter. My problem is that it did not do well inside the basement. It  dried up and the longer trailing branches long since dried up. In short, it looked nasty!

But when I try to look it up, I am getting conflicting information. What are the zones it can grow in? Will it survive winter here in Ohio? It is a very pretty and fast growing plant, I would love to have it growing outside and cascading over the side a one of my large garden planters. ….the hypertufa planters, that is. I am always looking for new and interesting succulents and sedum. 

But when I looked this plant up in the spring of 2014, I found information indicating  it would not survive freezing temperatures.

For example, on one website the USDA zone is given as 7a-11 ( http://davesgarden.com/guides/pf/go/58017/) and another with the same opinion lists it at zone 8a-11 ).  But it is listed as a bit more cold tolerant on _http://www.ballseed.com/Growers/plant_info.aspx?phid=056600001004984  .

But then this site lists the zones at 4A to 9B (http://www.gardenality.com/Plants/1475/Cactus-and-Succulents/Sea-Urchin-Sedum.html)

Whatever!