hi, i have two rhododendrons which are growing in very large pots about 3 feet apart. one is quite healthy and the other one is decidedly sick looking. about two weeks ago it started to wilt as if it hadn't been watered for a while, i checked the soil and it was neither dry nor waterlogged. i fed it last week with some ericacious feed, but to no avail. the leaves are green but have drooped and are quite dry and crispy and crumble if you touch them as if the plant is dead ( which it may well be for all i know ). it doesnt appear to have anything nasty like parasites or fungus or anything like that. does anyone know what might be wrong with it ?? the other one is quite healthy as is the one in the border.