Prince Charles -- which I'm lead to believe is a c. viticella and thus not prone to wilt -- appears to have ... wilt. See attached image. I suppose anything is possible but is this likely? It is currently flowering profusely but again, as I understand it, wilt starts at the bottom and works its way up the vine. I planted it last spring. It is on a south facing wall, against the house but doesn't get much sun until mid-morning and then only thru the early afternoon before the sun goes behind the neighbours flowering shrubs. I added some compost in the spring as well as some organic fertilizer. The roots aren't shaded but I have mounded up loose compost around the plant base. Must admit, this has me a bit confused.