You have a wonderful clematis there and what a bargain! :)
The tag was right this time, so no worries there. I have mine growing up an obelisk...it's a climber. Depending on what you have it growing on, it might do better to be tied in some places to give it a boost. It's hardy in my zone 5. If you're a worrier, add some extra mulch just before hard winter sets in. I do regular mulching to retain moisture and keep the roots cooler. Mine grows in full sun but Clematis on the Web says it can take some dappled shade.

Here is a link that might be useful: COTW

Thanks, this is good to know! You can probably tell it's my first clematis *g* and I want to do right by it-- although honestly, if it came back from being a dried little stick, I think it must be fairly tough. I'll be putting it in the ground this week.