Hi I have two new (12 months old ) small cumquat standard trees in potting mix at the front door. They are only about 600mm in height. All The leaves have a blotchy look to them and have falling off. New growth did start but the leaves are doing the same thing They get regular water and have been feed with slow release fertiliser The potting mix drains well. My guess is that they are missing something in the potting mix Thanks for your help. John