Drastic fluctuations in day and night temperature can cause the stress.

Jan 12, Get the Best Mortgage Rate for You Too Much Fertilization. Excessive fertilizer can lead to leaf drop. Young trees require light fertilization during the Pests on Citrus Trees. Certain insect pests can cause leaf drop on lemon and other citrus trees. California red scale is Root Rot.

Jan 21, Lemon trees love the sun, but there is such a thing as too much of it. Excessive sun exposure can cause the leaves to gradually bleach and fade. Shield your plants from sunburn by giving them shade when it’s too hot outside. Some farmers use the whitewashing method to act as a sunscreen by painting white latex on the bark of the stumpcleanup.barted Reading Time: 5 mins.

However it should be noted that bringing a lemon tree indoors can cause more leaves to drop if you do not follow the correct best practices of care….

Dec 21, It is common for leaf drop during Winter months in the UK, particularly if Citrus plants are in transit during very cold weather. Try to limit big changes in temperature, particularly during Winter by placing Citrus trees in airy porches with no central heating nearby. Citrus Trees Estimated Reading Time: 3 mins. Apr 16, If your window is cold or if you've got a fan in the room (which would dry the leaves), that might be contributing to the leaves falling off.

Improper soil amendments may also be.