The only thing that we have found which damaged the trees was the weight of snow on the branches when we had heavy snow here some years ago. My advice would be to keep watering to a minimum. Yellow leaves caused by overwatering will look like a mosaic of both yellow and green. For a well-adapted nonnative tree like the olive (Olea europaea), we recommend watering infrequently and deeply rather than a regular drip. Symptoms and Diagnosis. Signs of Overwatering in Orange Trees. Leaves are green yet brittle. The leaves will still be firmly attached to the plant. Young leaves become light green or yellow. People see a plant with drooping leaves and they automatically expect it to be lacking water when it can actually be too wet. If overwatering is an issue that may cause you stress, choose plants that will help you alleviate that stress. The Russian olive's capacity to overtake other plants is well-documented; it competes with them for nutrients, moisture and light. Tips for efﬁcient watering Read more on olive tree overwatering symptoms and how to protect your tree from overwatering in our article here. Signs of under- and over-watering Under-watering Soil is dry. One issue is that the physiological response or the symptoms of over watering and under watering are often the same. Leaves are wilted and/or curled. This year when we cut our trees back hard after olive picking we noticed that some of the trees are being eaten away by ants. In this video is Christopher explains how he grows olive tree indoors, I really liked the part about pruning (starts at minute 5:00): 3. The olive tree (Olea europaea) is an evergreen Mediterranean fruit tree that grows about 30 feet tall and 25 feet wide. The soil should be cool and moist. Plants may suffer from leaf scorch or leaf burn. To help you, we created a list of four signs to recognize when determining if there is too much water in your landscape. Over-watering Soil is constantly damp. Plants growing in soil that is too wet suffer from a lack of oxygen which leads to the death of roots and a loss of vigor in the plant. As of mid-2014, the tree was classified as a "noxious weed" in Colorado, New Mexico and Connecticut, where its growth is banned, according to the USDA Natural Resources Conservation Service. Another way to check is to dig 6-8 inches deep into the soil below the tree and get a handful of soil. Young shoots are wilted. One great option is to choose plants that need a lot of water. Older leaves turn yellow or brown and may even drop off. Overwatering your plants is a surprisingly common issue and a few small adjustments can help you improve your landscape. Algae and mushrooms are growing. If you are heavy-handed with the watering can, choose from these wonderful plants – astilbe, sedge, rose mallow, hibiscus, swamp azaleas and viburnum. Stunted slow growth with yellowing leaves is a symptom of over watering. Once identified, overwatered plants can still be rescued and thrive in your landscape. Another symptom of overwatering, one that is commonly confused with under-watering, is the appearance of yellow leaves. Olive Tree Leaves Are Dry & Falling Off. Olive Tree Also Hates to Be Too Dry. In … Orange trees are grown in tropical and subtropical climates, although they attain the best quality under subtropical conditions.