Why are my apples so small?
We moved to our home three years ago. In the backyard is what appears to be a very ancient apple tree. It still fruits and each year I've grown more bold in pruning it. This year I have it pruned just about where I think it needs to be.
I have no idea what kind of apples are on it, though because every year they have been very small, hard and bitter. They never get larger than a ping pong ball. They don't appear to have any major issues. The leaves look healthy. The apples do get some little black spots on them, but every year I've opened several and the spots appear to only affect the skin.
The tree its self seems healthy as well. It had a dead section which we removed and there is very healthy new growth every year.
I've never sprayed this tree. I've just been pruning it every year to open it up.
What do I need to do to help my apples grow? Is there a reason they're so small and bitter?