I had 4 mature japanese maple (don't know the variety) planted about 2 months ago. In the past couple of weeks one of them, in particular, has developed curled listless leaves gone brown around the edge and some of the leaves have a dusting of what looks like white mould. The bark and branches look ok. I can take a photo if it would help but don't have one to hand at moment.
4 weeks ago we planted mature (10ft) Portuguese Laurel which were transported from Italy. In the past week a lot of the leaves have turned yellow. They are watered every second day for about 20 mins per tree - are they getting too little or too much?