Well um, I LOVE your lavender house!!!
I think all Hybrid Tea roses are prima donna's that love their food, chemical sprays and booby coddling.
If you have time for it they are lovely.
Have you tried the Buck roses? Many of them are HT and a bit hardier.
Why not English Roses instead? They seem a bit easier to grow.
I never found any true lavender or "blue" roses. They always seem more pinky in real life.
I always loved Double Delight.
I love Dr. Bucks Freckles.
Waxy petals and lovely stripling!
Tournament of Roses did pretty good for me for awhile