I couldn't stand to see her all limp, and today her leaves were browning too, so I pruned her. Now my newly planted Cezanne is starting to do the same thing, although one stem is so far OK. I hate this!! We are definitely having some unusual weather, a rainstorm and cool temps every afternoon, so maybe that's part of the problem.

Gosh, I really wish I could help out, but I can't, I've never had that happen to me. Now that I just jinxed myself...

From what I've read, I will have to say that is weird for a viticella. I would have to say that all of my new transplants pretty much 'hang' there & don't put out a ton of growth hardly ever. Maybe it is growing to fast for what it can handle. The vigorousness sounds like a rockstar performer but maybe too much for it's own good at this point. I can't stand browning foliage & would have cut it back too.

I have never lived in CO but I have read of people's experiences. Mostly your elevation & proximity to the sun as well as wind can wreak havoc on your plants. On top of that it sounds like you have had a very cold spring. Correct me if I'm wrong. If I was a plant, I'd be all confused.

They sound like they are needing to be watered...are you having drying winds this year?...Jeanne

Jeanne, we have been having downpours every afternoon.

I thought one of new little ones had wilted, but it turned out both little stems were broken off at the base. I'm attempting to root one of them.
I've never seen real clematis wilt in Colorado. My plants are loving all this unusual moisture.

Boy, if this isn't clematis wilt, I wonder what it is. Three of mine now, or at least parts of them, have suddenly pooped out.

Maybe they are getting too much water?

That seems a more likely explanation, except that only one stem of my Cezanne and my Niobe-Henryi tangle wilted.

Maybe all the extra water is causing more top growth than the roots can handle.

Have you done a very very gentle tug on the limp stem? I ask that because my limp stem came right out and the end was broken or severed.
I know I have critters under the soil. Either bugs or voles. My cats kill at least one vole a day so I know there are voles.

Cnetter, no, I haven't tugged on the stem -- I've become ruthless and have just lopped 'em all off, encouraged by all the information I've read here that pruning is ultimately the best thing for them anyway.

BorS, I think I'm going to go with your theory. It could explain the Entel, a viticella no less, going down for the count.