Yellow leaves on viburnum tinus

Dennis Dobson

Hi 
I have recently planted an viburnum tinus 
.and have noticed that it's leaves are turning yellow and dropping .it's been watered in regularly and fed any ideas please.

Dovefromabove

A lot of leaves or a few? Even evergreens drop their leaves but they do it throughout the year a few at a time rather than all together in the autumn  ... could that be what’s happening?
if you think it's more than that show us some photos of the shrub ... we might be able to spot what’s going on. 
How much water are you giving them?  I have three in containers in shade and find that they don’t actually need as I had thought that they would.