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Dec 21, So What Causes Citrus Leaf Drop? Leaf drop happens when a citrus plant becomes stressed and this can be caused by one or more of the following: Dramatic changes in temperature: For example, if the tree is used to conditions in our nursery (12°C) then is delivered to a home where temperatures are significantly warmer (20°C and above).

While some leaf drop during winter and early spring is normal, there are several reasons for heavy leaf drop on lemon trees, including improper care, disease and fungi.

It is common for leaf drop during Winter Estimated Reading Time: 3 mins. Jan 12, Lemon trees thrive in areas of low frost, such as regions that fall within U.S. Department of Agriculture hardiness zones 9A through While some leaf drop during winter and early spring is. Oct 25, Now the bad news. If you bring a lemon tree indoors after it gets a chill outside it will most likely lose all its leaves.

Huge temperature swings cause stress and a massive change in humidity from a chilly +5 C exterior to a dry +21 interior is just too big. Your lemon will definitely drop it’s leaves as Louise mentions in her email below:Reviews: 2.