SuperHappyCamper...I used Beth's directions, but I my weather is so cool I have to use seedling heatmats (amazon). I also use
https://tlcfocus.com/paulbarde... TX rose rustlers directions for soil mix and how wet to get the soil and where and when to cut the rose stem. I got 90% success with both Beth and TX directions indoors (and heatmat). (I lost some to rot later and some to wind blowing them away) I now am trying hardwood cuttings outdoors.
Beth...Do you get much disease on your florists roses that you root? "It needs a greenhouse to keep the disease off," seems to be the excuse for companies not introducing florist roses to home gardeners and I wondered if that was actually true with the ones you have tried. (When florist roses were grown around the Portland area, the greenhouse allowed a longer growing season, kept the dirt and rain off the roses, but the same variety did fine in gardens.)
Apparently many gardeners in Australia are told by David Austin that DA roses won't grow on own roots they have to be grafted...funny how David Austin in the US can carry own root roses!