Wow a freeze already? Where in zone 8 are U? I'm in zone 8 also in the Antelope Valley, so far the coldest it's been is the hi 40's.

Depending on what you mean by winter hardy-something that will survive and come back in the spring? or stay green thru winter.

If you're looking for winter survival-come back in spring in full sun. You could try the trumpet vine, some passionflowers. I had 2 come back after being in all of last year's difficult weather, 1 on my front porch did not even lose it's leaves.

Here's what I have planted in my zone 8. Trumpet vines (planted this last spring), Passionflowers, Pink Jasmine (supposedly hardy to 10 degrees), Cape Honeysuckle, Snail Vine, Orange Clock Vine, Black Eyed Susans (orange & yellow)and Bleeding Heart Vine.

Now I must add that other than those 3 Passionflowers I mentioned, all of these others were planted this spring. I can only vouch for the Trumpets because I see them everywhere in my area return from the winter. They are fast growing. Most of the above will take full sun/maybe some shade in the heat of the day. Time will tell on most all of the other vines I have. I guess it all depends on how winter will be this year. Most of these also seem to be fairly fast growing as well. The Cape Honeysuckle I don't think is technically a vine but can be trained as such.

Thanks for the info.
The last 3 nights it froze here; (cold snap they say)
We are near Idyllwild, in the mountains above Palm Springs. We are called Z8 here, but that is not a true reading for us.

The ground freezes and it snows here so i am looking for a winter hardy vine that will come back in the spring and not freeze so quick. I love cape honeysuckle but I don't think that would work here. I like trumpet vines so maybe that would work too. I want something the hummers would like. My regular black eyed susans bloom really late, but I don't know about the BES vines.

If you happen to check this post again, considering where you are, I have been up there it's beautiful by the way. Sounds like Campsis Radicans should be hardy up there, read it can be hardy to zone 5 in Canada. It's beautiful and the hummers do like it. That's one of the reasons I've planted it as well. It's also a North American native.

Debbie