Photinia Red Robin

[MummaPI]

Hi
I played these as a screen about 3 to 4 years ago. They have grown but not really going like I'd hope. Any tips on how to get these to flourish? I'm a real beginner so any tips welcome!

*planted!

How big are they?
We bought some fairly big ones a couple of years ago which I felt weren't growing that quickly as I had thought that they would, but I have started noticing in the past few months or so they have seemed to have started to grow taller quicker.
There's still one trailing behind thought which does seem strange considering they were all originally the same size.

I am not sure you can do alot to make them grow but someone might be around to help you in a bit hopefully.

I'd be interested in answers here. I planted some of these but they're not really thriving - seem to grow long and leggy rather than bushy. Get a fair bit of leaf drop from them.

I also have them in my front garden and thinking about it I think they have probably grown the best there.
I have pruned them though, perhaps it has encouraged the growth.
They are definitely more filled out now too,I had them from scrawny small bushes.