Lilly Pilly Cascade - spots on leaves

[RonaldAce]

 

Hello. I was wondering if someone could help with my Lilly Polly cascades. Bought them mature size and have planted them on a raised bed. 10trees. Over a year ago.

Most have these brown spots on leaves and some trees aren’t growing as fast as others. Please see photos. 

 

 

[RonaldAce]

Awesome. Thank you @MitchellMc .
I have applied to plants, and hoping for a speedy recovery. 

Thanks again for your help.