We also have an ornamental pear tree in the front yard, which I bought and planted before my green epiphany. It has survived two summers, so must have a deep root system by now. I have been doing some reading, and reckon that because it is still fairly healthy, I can graft on fruit bearing pear stock onto this tree. How amazing will it be to convert a tree that was just bread for show, to a tree that we can enjoy juicy pears from! I like nature. It is so versatile!