I have not seen that yet with the leaning. this is the first year for ones against the house though since this is a new bed. I did notice some leaning in the other bed in the backyard though in the open garden.....
The big garden faces South and it is a mix of sun mostly and some dapple shade once in awhile..
they are all tall tall lilies back there and the biggest issue is they are somewhat under the overhang and they get dry and need more watering at times.........
I was told to stop the leaning in the back to plant another plant close by not sure the reason for that but that is why I have delphinium's near them.
Eventually they will multiple and be moved out towards the center of the garden is my guess or another bed if they have too....
there are about 29 tall Purple Prince back there and if they do indeed bloom deep purple like I have heard that they can they might be given away.........not fond of deep purple flowers of any type and they are saying almost black purple........light purple I can handle......
also due to the positions of them some are taller then others and that is likely to the way the sun is hitting themmm
will see what it all looks like in bloom
there are lilies everywhere on this property.......