Hi everyone, looking for some advice around caring and growing Murraya hedges. We planted our front yard with Murraya hedges 2-3 years ago. We have trimmed it once a year but it is not growing as fast as I would have expected. Could the sleepers on the ground be a limiting factor to their growth? I do have a soaker system where we turn on for 45mins twice a week.
I apply seasol to the hedges once a year but the soil has become dry (we have a lot of clay on our land) and filling up with debrie and leaves.
Any suggestions? see the pictures below.

