Q.Tiny Apple Growth
My baking apple tree ,for the last two years hasn’t produced many fruits, and what few appeared,were only the size of golf balls,the same with my two eating apples,they are all growing in largetubs,well watered and fed,have had them maybe between five and fifteen years,please can you help?… thank you .

Certified GKH Gardening Expert
I suspect the soil has not been changed or topdressed for a while. Trees in containers need compost added as a side dressing to help replenish the soil. It's also possible the tree is root bound and unable to take up nutrients.
Check the tree for pests as well. Poor pollination could also result in small apples.
It also could be the tree needs pruning.
Here are some articles that should help:
https://www.gardeningknowhow.com/edible/fruits/apples/container-grown-apple-trees.htm
https://www.gardeningknowhow.com/edible/fruits/fegen/pruning-for-potted-fruit-trees.htm
https://www.gardeningknowhow.com/edible/fruits/apples/pests-affecting-apples.htm
https://extension.umn.edu/fruit/growing-apples