marric,
Is that vine hardy in your area? I looked it up and it says USDA Zone 6 to 9 which means Canada Zone 7 to 10.

I too would love to grow Trumpet Vine. I saw one at Rona several years ago, but it was tagged at Zone 6.

There are many threads on other GW Forums stating that Trumpet Vine is invasive and warning people not to plant it, yet we can't even get it to grow in our zone.

I'm in the same z5a as you and I cannot keep a Trumpet Vine alive. That said, I have seen it growing in Hanover which is just west and a bit north of us. The spot it's in is more sheltered than what I have. We are out in the country and it is very open and windy in winter. Someone might be able to grow it in the city, in a sheltered spot. When I saw the Crossvine and read that it was a relative of the TV and an annual that set seeds, I thought it might be worth getting, even if I have to start a new one each year. Marg

No problem then if it's an annual.

If we get another mild winter like last year, I think I'll try a Trumpet Vine.

I got to thinking and I can't overwiner Rose of Sharon either. Two yhears ago, I thought I'd try to plant it in a pot and water well before sinking it into the ground. Both survived the winer. I wonder if this trick would help with the Trumpet Vine? If I can find one here on sale, I might give it a try. Marg

I am in zone 6b (Southwestern Ontario) and I've got a Bignonia capreolata that is hardy here. I received it from a neighbour who is successfully growing it. My plant is very small but it survived last winter with no protection. Next summer I'm expecting some vertical growth; this year it just put out a few tendrils.

Just to clarify: "Trumpet Vine" (Campsis radicans) is different than "Crossvine" (Bignonia capreolata).