This is one of my all time favorite reference books for growing roses in Minnesota and other cold climates. I used to grow quite a few roses but avoided hybrid teas so can't help you there.
https://garden.org/learn/artic...
The Lake Superior Rose Society (in my opinion) are an invaluable source of information for us die hard cold climate rose lovers. I would check them out especially regarding the tea roses. I haven't been to the Duluth Rose Garden at Leif Erickson Park in many years but spent hours there falling in love with roses as a kid. At that time they were predominantly tea type roses.
http://www.lsrsduluth.org/
