I was at Lowe's today and noticed that they have huge arabicum-crispum hybrid for a really great price and a few grafted but there were no open blooms. Anyway, I noticed that the pots were really wet, so I talked to the Store Manager and asked about why they are wet.
He said when it gets cold the plants do better if the roots are wet and prevent the roots from drying. I have always thought you shouldn't water desert roses when the temps are cold. So far, most of my desert roses have not lost their leaves. The back porch keeps them dry and they get direct morning sun. It would be interesting to see how many will not make it though more from stem rot.