GF wrote:
up until recently. Now the leaves are turning yellow and shedding quickly.

Could be chlorosis or just the normal leaf drop. If the leaves start to
turn yellow but the veins stay green it's chlorosis.

http://home.swbell.net/sugreene/Tree/image-250b.jpg
http://home.swbell.net/sugreene/Tree/image-254b.jpg

Do you realize those trees get pretty large? Over two stories high? It's
planted way too close to the house, you might want to move it.


--
Victor M. Martinez

http://www.che.utexas.edu/~martiv