I think it is called fruit spur thinning? I have a red gravenstein apple tree that has tons of spurs on it. I have a hard time thinning these as this tree always blooms well, but rarely sets fruit. I know I have pollinators for it. Last year, when the red gravenstein was in full bloom, I had 30 other varieties of apple in bloom too. It bloomed well and set 2 apples. This is its 5th year so I suspect it will do better. Do you thin the fruit spurs on your trees? Also, I have mason bees and several mornings I watched them work over the red gravenstein tree, so it isn't lack of bees. I plan to document this tree this year through photos and record keeping to see if anything stands out as to why it doesn't fruit. I might even have a leaf analysis of it done. Thanks for any input.

Greg