We planted two plum trees two or three summers ago. (yeah I know but it's definitely 2 or 3, no more no less) They are now about 6 feet high and very leafy and flower each spring. They have yet to produce fruit with the exception of one single lone plum this year. When we chose them at the nursery we picked them because they are supposed to be self fertile. I'm wondering if they are too young yet to properly set fruit or if they are not actually self fertile. They are labelled "Italian Prune" which I'm guessing is an Italian cultivar of European plum (and has never produced a single fruit) and the other is labelled "Peach European Plum" which I can't seem to find anywhere online any info about however it has one lone plum this year. I've found lot's of info about peaches and lots about European plums but no reference to this particular plum cultivar. I'm fairly certain they are both on dwarf rootstock because we were after all dwarf trees at the time (we also got apples and cherries and hazelnuts at the same time). Are these really two plum trees that should produce at least *some* plums on their own as we were told at the nursery? Are they likely to help fertilize each other (they do seem to flower around the same time)? How many years does it generally take for a European plum to be mature enough to produce? This year when they were flowering at their peak we were getting regular rain and the rain pretty much let up about the time the blooms were dying off, is this likely to result in zero fruit as well? Is there anything to be done if this happens next spring? I guess I could tarp them and pollinate them with a brush or some other crazy scheme but I'm guessing commercial orchards must deal with rain some how without losing their entire crop every year so perhaps it's not as big a deal as I think it might be?