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Reasons Why Orange Trees Drop Their Leaves Over or Under-Watering. Issues with watering are the most common reason why orange trees drop their leaves prematurely.

Extreme Temperatures. Orange trees prefer temperatures between 27ºF to ºF and will start to drop leaves outside of Transplant. Jul 02, An orange tree (Citrus sinensis) can lose its leaves for a number of reasons, few of which mean the tree is dead. Diseases, pests and environmental factors can cause leaf drop that won't. Jul 17, Low light levels area common reason for leaf drop and sometimes shoots may die back.

Orange tree in danger.

The plant should be placed in a position where it receives the brightest light. Any shoots that have died should be pruned back to healthy wood. Sudden temperature changes or low temperatures can result in the loss of leaves.

Feb 05, You need to determine why the leaves are falling off. The 2 main reasons are root rot (from too much water/compacted soil) and the cold root/sunlight combination mentioned earlier. When was the last change of potting soil? If it has been a while ( yrs) I would suggest a repotting. There are other causes, as Junglekeeper mentioned low humidity. Apr 22, If your orange leaves are curling, the culprit might just be a fungal disease. Both bacterial blast and botrytis disease result in leaf curling.

Bacterial blast begins with black spots on the petiole and moves on to the axil. Eventually, the leaves curl, wither, and drop.

Soil moisture problems also can cause fruit to drop before it’s ripe. Dry or waterlogged soils also can cause fruit to fall prematurely. Make sure the plant receives sufficient water, and mulch the soil to keep surface roots moist.

Sep 01, There are three general reasons why trees lose their leaves early. The canopy is crowded. Some trees may have grown more leaves than they can support, so they drop leaves to conserve water in hot, dry weather.

th. It's a pest or disease. See what summer pest could be hurting your tree leaves.