"Viburnum: I don't know much about this vine?"

That may be because it is not a vine :-) It is a shrub, so a lot more width than any vine would produce. And no ability to climb.

In your climate, not many vines or climbers will have any winter interest. And the climbing hydrangea needs a stronger, larger, more solid surface than a trellis will provide. If you decide on that, just plant so it can grow on the fence. Roses take a lot of maintenance to look good. Personally, I'd stay with the clematis or the honeysuckle.

Thanks Gardengal! As usual, good advice - I appreciate your expertise.

My father has climbing hydrangea and, while after years, it still doesn't protrude from the fence too far, it doesn't look great, and I tend to have more of a green thumb so I'd worry it would grow too thick. On the hydrangea forums, some folks suggest viburnum as an alternative that is easier, less thick, and more visually appealing.

What type of maintenance does the rose take? A lot of dead-heading and trimming?

I always like honeysuckle, and I think I've seen it grown with clematis mixed in, as well. Any problems mixing the two? Or should I grow them in separate spots?

Generally honeysuckle and clematis have different sizes and level of vigor, so I most likely wouldn't plant them together. Also, many clematis bloom better if given regular pruning, so would do better planted separately.

If you plant a hard prune clematis on an ornamental metal trellis it will be pretty in the summer, and then after hard freeze you can cut them back hard, remove the old vines, and then enjoy the silhouette of the trellis for the winter, either with or without twinkling little lights. I decorate some of my clematis supports with lights that are battery powered for the winter.

Thanks Babs!

Any other vines I should consider? I hear mixed info about whether any evergreens can stay green in Pittsburgh, just outside their ideal zone, like false Jasmine or Clematis Armandii.

Hmm, the question is where to find the Margarita!

Brushwood carries it but they are currently sold out. You can ask to get an email when they have it in stock again. The form is at the page bottom.

Lazy S's also is sold out.

I have ordered from both nurseries and have been very pleased with the plants. You can ask at good nurseries in your area to see if anyone carries it.

Yeah, my guess is a local nursery might be willing to order it as well.

A few people didn't think any variety of false jade would stay green in Pittsburgh. I think there is a chance, but not gonna gamble on it. I might try euonymous with clematis.

Plant the Euonymus on a solid surface like the fence. Clematis need something about the diameter of a pencil or smaller to wrap leaf stems around.