What caused cross pollination between my plum and pear trees?
I had a fruit tree which I thought was a plum. It often had flowers early in the spring but never any fruit, so I bought another early flowering plum to pollinate it. I bought the plum this spring and the first tree had an abundance of fruit but they were pears, not plums. I am now wondering how my plum tree cross-pollinated my pear tree?
I can assure you that the plum pollen did not pollinate the pear flowers. You may have had good pollination conditions which allowed the pear to self pollinate. or another pear in the neighborhood did the job with the help of some bees.