As for your apples, it turns out that you are not alone – many people report issues growing Wolf River apples, going years without seeing flowers and thereby fruit. Even though the plant itself was developed in Wisconsin and is known to be very hardy, that doesn’t necessarily mean that its flower buds are. I think the most likely explanation is that the flower buds are getting frozen off before they even have a chance to appear, but you should be able to see whether flower buds even set in the first place by carefully inspecting the tree in late winter – here are some good photos on how to tell the difference between a flower bud and one that will open to only leaves.  As for your pear question – both Rick and I researched it and found it could be a lot of things: water stress (especially drought – and prematurely dropping fruit is a classic sign), nutrient deficiency, herbicide drift, anthracnose, a pest known as the pear leafcurling midge…it goes on. Because there are so many possibilities to consider, we encourage you to contact your local cooperative extension office and ask them. They will be the true experts on what may be plaguing a species in your particular area.