First off what's your general location please and what's the name of the hybrid tea rose? Thanks...So people can help you better...

Thanks Jim . My apologies I didn't give detailed info as I thot the rule applies to all rose types. Apparently I was wrong . My hybrid tea is a 100% Canadian grown. It's called Winter Sun

im in zone 5b

Winter Sun is a modern Kordes rose. Worried about their customers not being able to use fungicides, Kordes threw out their old breeding lines and started over to grow roses that could be grown without fungicides.

http://www.kordes-rosen.com/gardenroses/eleganza/gardenrose-winter-sun?___from_store=de&___store=en&duft=20&from=category

also showing a high disease resistance to fungal diseases

"showing nearly no affliction"

Some roses are very resistant. I've had problems with blackspot this year even with spraying. We've had constant rain, so it creates the perfect conditions for it. However, some roses resist. I have Dark Desire, also a Kordes rose, that I have stopped spraying and it has not shown any blackspot. You will have to get to know your rose and see how it reacts.

I have Winter Sun and she is a bit tender for Zone 5. I live in Massachusetts, Z5b and my Winter Sun is struggling. I bought her own root last year so her young age may be a contributing factor. She died back to the ground and is only about 6 inches tall. No black spot on any of her leaves though!

Barbara- for me Pink Enchantment and Savannah are iffy. South Africa is pretty hardy and survived the winter pretty well planted as own root last year. Some of my best Kordes performers are Earth Angel, Honeymoon, Jolie Veranda, Cream Veranda, Lavender Veranda, Colorscape Fire Opal, Dark Desire, Caramel Fairytale, Poseidon and Madame Anisette (she hasn't bloomed yet but I've read I need to be patient) They had very little winter cane die back and great disease resistance. All are own root and no more than two years old. Solero Veranda seems to be, from my experience, the only hardy yellow since Caramel is more golden. Her flowers are beautiful though since they have such a blend of colors.

Sharon

Oh no enchantedrose ! U made me worry about my winter sun now . I love it and hopefully it will survive the winter . It is now around 2 feet height and 1 foot width

Interesting regional difference Buford. My Dark Desires in different beds both defoliated while Summer Romance and Fire Opal look awesome.

Lydia- I don't winter protect my roses. Maybe winter protecting yours will be all she needs to survive through your winter.

Lydia if you can buy an extra bag of garden soil and keep it dry until the cold sets in. then dump some of the soil over the base of your rose she should be fine. I now have all of the newer disease resistant yellows so time will tell how they do. One positive good for here is Sunny Sky. Another is Lemon Fizz thou not every one likes singles. I will go out and write down the names of those who survived last winters -14F. I do not winter protect either but I do bury deeper than the roses where growing in the pot.