I have a row of Camellia sasanqua 'Leslie Ann' they are upright growers. Anyway every year they experience die back caused by a fungus. Two of them are doing very well, but the other three are substantially affected every year. I use mulch and planted them high. I think the area is too wet in general. Should I dig up the three and plant another kind of plant? If so, what kind? It needs to be wet-tolerant (obviously) with narrow upright growth, and preferably wildlife value.