Lemon trees are widely grown for their tart and juicy fruit. Unfortunately, lemon tree leaves will often start to turn yellow, which can be a worrying sight for any proud lemon tree owner. But why are lemon leaves typically turning yellow?
The primary reason for this yellowing of the leaves is typically due to inadequate nutrients, such as nitrogen, calcium, and magnesium. If these essential elements are lacking in the soil, the leaves will naturally appear yellow instead of green. Additionally, if the soil doesn’t have enough water, the leaves can also start to yellow.
Another possible cause of yellowing leaves is the presence of certain pests, such as aphids and spider mites, which can feed off the tree’s sap and weaken the leaves, making them prone to yellowing. Additionally, too much sun or excessive fertilizer use can damage the tree’s leaves, making them more likely to turn yellow.
To prevent your lemon tree’s leaves from turning yellow, it is important to ensure that the soil contains the adequate amount of essential nutrients. If needed, add fertilizer with high levels of nitrogen, calcium, and magnesium. Also, monitor the soil’s moisture level and water regularly. Additionally, manage the amount of sunlight that the tree is exposed to, and avoid excessive fertilization.
In the event that the lemon tree’s leaves have already begun to yellow, it is important to take action as soon as possible. If there are pests present, use an insecticidal spray to eradicate them. Additionally, remove the affected leaves and possibly consider repotting the lemon tree in new, nutrient-rich soil.
Finally, consider applying a fertilizer with a balanced N-P-K ratio, as this will help replenish the lemon tree’s essential nutrients. All of these steps will help reduce the yellowing of the tree’s leaves and ensure that healthy foliage is maintained.
Underlying Disease
sometimes yellowing of lemon tree leaves is caused by an underlying disease. Bacterial canker disease, for example, typically manifests itself with dark spots on the tree’s leaves and yellowing of the stem and leaves. To control the bacteria, prune the affected areas and remove dead leaves, as the bacteria can spread by way of these parts. Additionally, an appropriate treatment with a fungicide can help to reduce canker.
Too Much/Little Water
Providing your lemon tree with too much or too little water can also lead to yellowing of the leaves. If the tree receives too much water, it can cause the leaves to yellow and eventually fall off, while if there is not enough water, the leaves will begin to show signs of wilting and eventually yellow. To ensure that the lemon tree is properly watered, use a soil moisture meter and adjust the quantity of water accordingly.
Temperature Fluctuations
Temperature fluctuations can also cause lemon tree leaves to turn yellow. For instance, if the tree is exposed to periods of extreme cold, it can lead to leaf discoloration. To protect the tree from such temperature shifts, consider providing protection with a blanket, mulch or tarp. Additionally, ensure that the tree has adequate airflow and is not exposed to strong drafts or winds.
Incorrect Pruning
Finally, incorrect pruning can damage your lemon tree and cause the leaves to turn yellow. Pruning should be done carefully and only when necessary, as it can harm the tree’s growth and cause the leaves to quickly yellow. If you notice that your tree’s leaves are yellowing, evaluate the pruning techniques being used to ensure they are not doing more harm than good.
