Posted: 21/08/2013 at 23:55
David, bear in mind not to plant too deeply. They hate their roots buried too deep. You are right...they are shallow rooting. Don't overpot but your pot does look very small. Rhodos have relatively small root systems so don't worry about that. No, dont mix with sand. Clearly too the plant is drowning. In winter this will be fatal. Are you watering a lot?
I would repot with fresh compost and water in but then hold back on the watering.