The orange tree is one of the most common fruit trees in backyards and gardens, but it is also one of the first to show visible signs when something is wrong. Among the most frequent signs is wrinkling of the leaves, a symptom that many ignore, but which can reveal important problems in the plant. In addition to wrinkling, other negative symptoms may appear, such as yellowing of the leaves of the orange tree or the possibility of premature falling with deformities.
What does it mean when orange tree leaves are wrinkled?
If you notice that the leaves on your orange tree are wrinkled, this may be a sign that the plant is under stress, possibly due to a pest that sucks the sap and weakens the leaves. Among these, it may be due to an attack by aphids, one of the main causes of wrinkling. These small insects feed on the sap of young leaves, causing deformities, curling and a wrinkled appearance.
Another reason is water stress, either from insufficient or excessive watering, which can cause bent or wrinkled leaves. If there is not enough water, the plant dehydrates and retracts its leaves to conserve moisture. On the other hand, if there is too much water, the roots suffocate and cannot absorb nutrients properly. In addition, deficiencies in calcium, magnesium and nitrogen can result in deformed leaves, slow growth and pale or yellowish colouring. Diseases such as citrus tristeza virus (CTV) or fungal infections can also cause this problem.
How to solve the problem
To solve the problem of dry leaves on your orange tree, it is very important to identify what is causing it and take action. Pruning is always a good option, but the best thing to do in each case is to check for aphids and act quickly. Watering only when the top 3-5 cm of soil is dry is another option, as is using a citrus fertiliser with micro and macronutrients, especially magnesium and nitrogen. Applying it in early spring and repeating in summer is usually enough to solve any problems.
If there is a heatwave, as is forecast for this summer, provide shade during the hottest hours. In winter, if there is a risk of frost, cover the tree with a thermal blanket. If, in addition to wrinkling, you notice stained leaves, dry branches or leaf fall, it could be a virus or fungus. In this case, it is advisable to consult a specialist or nursery.