Over the next few weeks, abscission cells form a bumpy line.

Orange trees drop leaves from over or under-watering, extreme temperatures, transplant shock, pests, and diseases. However, issues with watering and temperatures are the most common.

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To prevent leaves from dropping, only water orange trees when the first inches of soil gets dry and avoid temperatures below 27ºF. Jul 17, It is not uncommon for citrus trees to naturally drop a small number of leaves especially in winter.

Where a large proportion of leaves fall it is a sign that the plant is under stress and there are a number of possible causes. Low light levels area common reason. Why Do Leaves Fall Off Trees? As the days grow shorter and cooler air temperatures roll in, the color of Indiana’s trees change from summer green to the brilliant fall shades of orange, yellow, red and brown.

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It’s fall. Soon, the leaves will fall to the ground or will they? Okay, I've read most of your postings regarding falling leaves. I have an orange tree that is doing the same. Only problem is that the tree is a mature tree and is planted in the ground. It produces wonderful oranges but part of the tree located on the very top section shows it drying out with falling leaves while the rest of the tree looks.

Feb 05, There are two abscission zones for citrus leaves, one at the bottom of the petiole (leaf stem) for normal leaf drop, as in the case of the discarding of older leaves, and another at the bottom of the leaf blade when abscission is caused by certain types of stress. In the latter case, the petiole remains attached to the branch.

Apr 22, Citrus trees may be affected adversely by pests, diseases, environmental conditions, and/or cultural practices. There are four major reasons for leaf curl in orange trees: pests, disease, water stress, and weather. Sometimes it’s a combination of all.