I often drive past a house that has this trained up the pole for their front light. It has hit 5 or so feet and needs to be trimmed to keep it off the light. So I would expect it to get taller than 5 feet.

Also, you might want to try again on the clematis. I've gotten a bunch of mail order clematis from reputable sources like Brushwood, Silver Star, and Hummingbird Farm and they seem to be what they are supposed to be (though I don't know if any of them ship to Canada.) Alaternatively, you can get them at garden centers in bloom so you can see the color. In general the Viticella hybrids don't get wilt and some of them get big enough to cover your trellis well. Flower size and color varies quite a bit amongst the viticella hybrids.

Nice looking garden - I especially like the varied textures in the overhead view.

Beautiful garden!

I haven't had much luck with Emerald gaiety...mine grew more as a small groundcover / creeper and never did much of anything - perhaps the crown gall disease was to blame -but I chucked them all.

I do have two Sarcoxie Euonymus on my property - one in full sun from midday on, and the other in full shade. They both have done well for me with the exception of scale on the one in full shade last year. In full shade, I've seen no blooms but it hasn't established as long as the other has.

The full sun Sarcoxie gets a beautiful carpet of purple flowers on the groundcreepers, but it took a good 4 years to get there. It branches both vertically and horizontally along my 4 1/2 foot fence. I trim the branches at fence height, so I don't know how tall this plant will actually climb on an arbor or trellis. It's a nice evergreen branching habit along my fence. This was one of the first plants in my yard as a newbie, and I couldn't be happier. No problems with scale in the sunny location (keeping my fingers crossed).

Unfortunately, my new rescue dogs like to pottie where the branches creep as a groundcover, causing dieback in those areas, so I didn't get the flowers this past year.

nhbabs - I'd probably grow clematis with the euonymus to add some color. The conditions are sort of tough by the arbour, especially on the right side where it gets sun all day. The left side gets shade from the garage in mid-late afternoon so it's not quite as dry there as the other side is. The clematises died out on the right side, but several survived on the left (as you can see in the first picture above).

Thanks hosenemesis - this bed has evolved considerably since we started it and it's still changing. The picture above was taken before we added an 8' iron tuteur (for growing clematises) in mid-summer. We also added some hydrangeas and removed some roses. I didn't get any 'bird's eye' photos after the changes but this shows where the changes occured:
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kimcoco - What appeals to me about the Emerald Gaiety is the variegation, which makes it look less 'heavy' and repeats similar variegation elsewhere in the front garden. I will have to give more thought to whether a solid green could provide the picture I want for there....

Emerald Gaiety climbed 10 feet up the side of my garage ... before it was afflicted with scale so badly that I had to remove it.

The 10' sounds promising... How long did it take to get to that height?

I have EG growing up a stone wall, where it is self clinging, like Hedera helix. It has grown slowly and is now about 4 feet high. It would probably be taller if I tied some branches in. It is not fussy about soil and is in dappled light much of the time. Scale doesn't seem to be an issue. However, snails love hiding behind it stuck to the wall.

My Emerald Gaiety was 10' up the side of my garage in around 4 years. It wasn't my plan for it to grow up the garage, but ... obviously the plant had other ideas.

aegis500 - thanks for the info. Hmmm... the EG is definitely sounding like it's worth a try on the arbour...

I can't help with an evergreen suggestion, but for the last several years I've grown climbing/trailing nasturtiums (Pinetree Seeds) on my arbor. Some years it grows 12-14 feet. The ones in the pic are all planted on the left side of the arbor, wrapped around the top, down the other side and some started back up again. Hummingbirds and Hummingbird Moths love them and they shade the hummingbird feeder. And they add a great peppery taste for salads to boot!

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tj

Thanks for the suggestion - but the colors don't suit my garden and I prefer perennials or woody plants to annuals.