The Q&A Archives: lemon tree

Question: my son lives is whittier & has a 10 year old lemon tree. this year the lemons are the size of a little finger nail, turn black and fall off. Why?

Answer: What you describe may be natural: Citrus trees go through a natural thinning process when excess fruit is aborted. The fruits can also turn black and fall off if they are not completely pollinated. Or, if the tree experienced as little as 6 hours of nearly freezing temperatures while the flower buds were open, the result will be the dropping of immature fruits. As long as the tree is healthy and putting out new growth, it is fine (not diseased) but has simply suffered a stress during the blossoming period. Best wishes with your lemon tree.

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