have 3 apple trees approx 4 years old. very little flowers this year. now there is no fruit .after flowering the stalk fell off. whats wrong?
Apple trees need deep, well-drained fertile soil in a sunny, sheltered position with no competition from grass or weeds, or from the roots of large trees. More at: https://gardenie.wpengine.com/gerrycategory/apples/?id=5389
They may also suffer from apple scab disease which debilitates the trees.