I purchased the tree from a local nursery (it had the Dave Wilson label on it). It is a Double-Delight Nectarine. It was about 6 feet tall and very skinny. I planted it into the ground in March of 2012, and cut it down to 30" off the ground. I literally used a measuring tape when I did it

Here are some pictures of it's progression:
3/11/13: Complete year in the ground

6/14/13:

11/16/13: Before pruning

11/16/13: After pruning

3/02/14: Spring flowering

04/02/14: Added mulch

4/02/14: Wider shot

I put some typical plant/tree food fertilizer on 3/28/14. Any tips are greatly appreciated.