New leaves on Japanese Maple dying
I have a japanese maple in a pot. Since the start of spring it has grown vigorously with long branches and healthy leaves sprouting. In the past week however, the newest leaves on the tips of these branches has begun to wilt and dry out, before eventually falling off. I water the plant two- three times a week, depending on how hot it has been. It gets morning sun until about 11am.
What is going wrong?! Am I watering too much, or too little? Does the soil need extra nutrients to reach the tips of the branches?