Limp Japonica - but only on one side
A few weeks ago I bought a medium sized Fatsia Japonica from my local garden centre and planted in in a newly created bed. I have just set up a few new beds in my yard, as we have moved to a new build property. We've removed the roll on lawn to create beds, and have to excavate quite a lot of heavy clay and replace with soil improver - organic top soil.
For a while the Japonica has appeared to be content, but increasingly recently it has developed a significant droop on one side. The plant has two established stems coming from a single root ball, and it's as if each stem has a different personality. Leaves on the one are green and developing, whilst on the other they are wilting and simply limp - definitely giving the impression of dying slowly.
I have seen that Japonicas may be victim to various forms of root rot, but what is confusing me is the Jeckly and Hyde nature of the two stems, which are part of a single plant.
Any advice would be most gratefully received.