I see so many beautiful yaupons and they are dense with leaves. The one
pictured here

http://sitekreator.com/wronp/garden_spot.html

was planted about two years ago and just does not seem to be very happy.
The soil is good and compost is added each spring. I am careful not to
over-water. It is in partial shade with morning sun.

How can I help this guy grow more foliage?

thanks