SPedigrees
Garden Addicted
Surprisingly the little micro mini rose bushes my dad used to send me every year at Valentines Day managed to survive two or three years in my garden when planted outside, because these almost certainly would have been grown in a greenhouse with conditions the same as what you mention. But they were inevitably doomed after a few of our harsh winters.I was not offering a caution for a Rhode Island gardener but I worked in a commercial rose greenhouse for some time. Yes, I was one of those people growing and cutting those flowers for the flower shops. During my years there, bushes were pulled and replaced. Sometimes, cuttings were done and those were sent off so that they could be grafted onto suitable rootstock.
Some of the bushes were sold to the public. They went for a very reasonable price but no guarantee. You see, they were very suitable for greenhouses but one aspect to that was that their growing temperature never fell below 60°f (16°C) nor rose above 85°f (27⁰C). Did it mean that they couldn't survive our Zone 5 Winters? Not necessarily but that was for some of them. Honestly, we didn't receive many positive reports back.
Tea roses are from southern China, we are told. Southern China is either in a Cfa or Cfb climate zone, which means temperate with no dry seasons and either hot or warm Summers. Köppen maps
So, where are we? And, how much have these hybrid teas been changed? Well, it varies ... for both. It is a worthwhile experiment. Some commercial cutting roses are absolutely stunning. Don't be afraid to try some of the miniatures – understand that smaller flowers and shorter stems does not mean smaller plants for these commercial varieties. They are vigorous growers and that may translate well for being adaptable. At least, that was my impression.
Steve