I have been throwing seeds and berries from all the fruit and berries I eat into this one spot in my backyard for about 2 or 3 years. Last year in early spring I had this plant start to grow and I thought it was going to be a blueberry bush. Now 2 years later it is about 5 feet tall and it has had no blooms. The leaves are in a 3 prong pattern and the stem is almost a bark color but when it first came thru the soil the stem was a purple/blue color. I have been on 2 other sites trying to find out what it could be and have had no luck. A friend told me to go here and give it a try. Please look at the pic.s and if you have questions, Please ask. I really would like to know what it is. Here are a list of fruit and berry seeds I have put there: Plum, apricot, apple, pluet, orange, blueberry, raspberry, black berry, and maybe some other odd and end fruit.I can't find a way to add a pic. here so here is a link to another site that has the picture. go to plant identification in the forums and find my post: by spbond.
http://davesgarden.com/community/forums/t/1028806/#post_6962626