I would acclimate the young plants that have been growing under 100% humidity protection very slowly to relatively harsh environment like direct sun, dryness and cold wind.

Then, I would have to realize that the root system is not as strong as Dr. Huey. The growth would probably begin very slowly and sometimes would not be strong enough to survive in my zone 5.

Last year, I had 100% success rate of rooting under the cover of plastic jug in spring. But I lost 70% of them thereafter. The one survived even had a couple of huge flowers in the first year. But I had to cover them again this winter with plastic jugs. Of course, I started new cuttings last fall as well. The zone 9 as yours would be easier, I guess.

After second year of survival, I would treat them as the ones I buy as own root plants from nurseries in Texas or California.

Yes, it is slow experimental (especially hybrid tea) process but fun.

You really have no way of knowing if you have any roots, foliage is not an indication. Take the covers off for about 30 minutes on a cloudy day. If they do not wilt put the covers back and try again the next day for an hour. When you can leave the covers off for several hours or all day without wilting you know you have roots and then only put the covers on at night as long as frost is a possibility. Al

Thank you, that was a helpful suggestion!