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Alex [Lithuania z6a] 13 days ago.

Dec 10, Temperature Changes. Sudden, drastic temperature swings, especially right after fruit set, could cause the tree to drop immature fruit. High. Dec 14, Excessive pruning can stress the citrus tree and remove too much of its foliage, forcing fruit drop. A severe pest infestation can also stress the tree enough to cause fruit drop.

Apr 24, At the base of the stamen is the hip. If the fruit hadn't set, the hip would have fallen off with the flower. The white stamen will fall off the hip, and whats left is the immature fruit. If the fruit fall off at this stage it's a nutrition or watering problem, NOT a pollination problem. – Escoce. Sharon, how often and how much are you watering? Usually, fruit drop is due to not enough water, but it can also be due to roots being waterlogged.

A certain amount of fruit drop is normal, especially in such a young tree. Citrus will set way more fruit than they can take to maturity, so at about pea size, you'll see the first significant drop.

Jun 04, 4. Check the nutrient levels of your citrus tree. A lack of potash is a common cause of citrus trees dropping fruit before it is ready to eat.

Always prefer a specialized citrus fertilizer over a more general one as the nutrient balance will be right for the tree.