I am living in Newfoundland and I planted two plum and two pear trees about four years ago. The problem I am having is that my pear trees have spots about the size of a nickle and are rusty in colour. I would like to know what it is and how to fix it. Also, my plum trees haven't blossomed since I planted them. Why and can I speed up this process? The pear trees have started to yeld fruit but they are scarce and small. Can I expect them to get bigger and they had black spots on them. I expected a late frost may be the reason.
Fruit Tree Problems
Certified GKH Gardening Expert
It sounds like your pear tree has apple rust (which also affects pears). Here is more information on that: https://extension.psu.edu/plants/gardening/fphg/pome/diseases/rust For the plum tree, it is likely just not yet mature enough to bear fruit. They can take 3-6 years to mature. It may bloom for you this year. You can add some bone meal to the soil and that may help.