I live in Northern Me and on a postage stamp lot. I really love cherries and had always wanted a tree because they are so beautiful. Because of such a small yard I have size limitations- not so much as UP as I have limited space OUT. I bought a Nanking cherry bush last year because it said it was a self pollinator. Now I read everywhere saying it won't produce that many cherries unless it has a polinator. I barely have the room for the one Nanking I have. Also I have been reading that Nankings have small fruit that has large pits. Should I just give my cherry shrub to my mom and get something else? If so what cherry bush/shrub/tree would fit in a small 6'-8' footprint. It would be in full sun, but in the corner of my 6' fence. We have gotten to -30 in the past but where we are in town and with our fence we have been able to push our zone a lot. I have raspberry bushes and plan on doing blueberries but really wanted some kind of sweet cherry. Thanks in advance.