Why are Calamansi Leaves Turning Yellow? Causes and Expert Remedies

5/5 - (20 votes)

Why Are Calamansi Leaves Turning Yellow

The prospect of your Calamansi leaves turning yellow certainly throws a wrench into the serene activity of gardening. This marking event drags one into the investigative world of botanical puzzles, where colors speak volumes about health and hidden disorders of your beloved plants.

Just imagine for a minute, amidst a healthy lush green, a sudden flare of yellow registers alarm. Yet, it’s not an immediate death sentence for your Calamansi. Instead, it’s a complex cry for help, with solutions rooted in understanding and grappling with the intricate aspects of gardening.

Why Are Calamansi Leaves Turning Yellow?

1. Nutrient deficiency

Description can cause yellowing of calamansi leaves, such as lack of iron or nitrogen.
Solution : Provide proper fertilization with a balanced nutrient solution to prevent Calamansi leaves from turning yellow.

Nutrient Deficiency usually causes yellowing leaves in calamansi plants. When there are not enough nutrients present in the soil, the plants cannot perform photosynthesis efficiently which can lead to yellowing. This happens due to a lack of chlorophyll, the pigment responsible for the green hue in plants. Nutrient Deficiencies that most commonly lead to yellow leaves are Nitrogen (N), Iron (Fe), and Magnesium (Mg). This does not only make leaves turn yellow, but also stunts the growth and development of the plant, compromising the quantity and quality of fruit it would yield.

To address Nutrient Deficiency, you can perform a soil test. Such a test will determine which nutrients are in short supply, allowing you to choose a suitable fertilizer. For an immediate effect, you can opt for water-soluble fertilizers though its impact is relatively short-term. For a long-term solution, consider applying slow-release or organic granular fertilizers which not only supply needed nutrients but also improves the overall soil structure.

Additionally, proper watering practices can prevent nutrient drain. Overwatering can cause nutrient runoff, while underwatering may hinder nutrient uptake. Regular monitoring of plants’ health, maintaining balanced watering practices, and timely fertilization can help prevent the yellowing of calamansi leaves.

2. Overwatering

Description can lead to root rot, disrupting nutrient uptake and causing yellowing of the leaves.
Solution Reduce watering and ensure proper drainage to prevent root rot and promote healthy leaf color.

Overwatering can often cause the leaves of a calamansi plant to turn yellow. Overwatering Problem typically leads to waterlogged soil and root rot, which prevents the roots from effectively absorbing essential nutrients. In turn, the lack of proper nutrition manifests on the plant as yellow leaves.

To resolve this issue, you should immediately reduce the amount of watering. Be sure to Adjust Watering so the top inch of soil has time to dry out between watering sessions. Not only will this prevent overwatering, but also encourage stronger and healthier root growth.

Additionally, improving the soil’s drainage might also be essential. You can Improve Drainage by adding coarse sand, perlite, or compost to the soil. This ensures excess water drains away more quickly, preventing root rot and promoting healthier calamansi plant growth.

Finally, consider Repotting the plant if the health doesn’t improve despite correcting watering practices and improving soil drainage. Choose a pot with sufficient drainage holes and use well-draining soil to prevent any water logging in the future.

3. Underwatering

Description Insufficient water supply leads to yellowing of calamansi leaves by affecting their physiological processes.
Solution Increase watering frequency to provide enough moisture for healthy leaf growth.

Impact of Underwatering
Underwatering is the prime reason why calamansi leaves turn yellow. The calamansi plant requires a sufficient amount of water to maintain its growth and health, just like any other plant. When it doesn’t receive enough water, the leaves can become dehydrated and begin to yellow. The plant uses water to transport nutrients, so without sufficient water, the plant may also become nutrient-deficient.

To cure your calamansi of yellowing leaves due to underwatering, you need to adjust your watering routine. Try to water the plant uniformly, ensuring every part of the root zone gets wet but not waterlogged. The top few inches of the soil should be allowed to dry out between waterings to avoid overwatering. A good rule of thumb is to water deeply but infrequently for matured plants, whereas seedlings may require more frequent watering.

Again, the specific amount of water can differ depending on the plant’s size, the weather, and the pot’s size and type. A drastic change in the watering routine may shock the plant, so make changes gradually. Ensure proper drainage too, to prevent waterlogged soil and root rot since even though you need to water regularly, calamansi plants, like most citrus plants, don’t like “wet feet.”

Secondary Steps
Finally, consider using a moisture meter to measure the soil’s wetness and determine the perfect watering schedule. Additionally, under watering can lead to nutrient deficiencies that could further harm your plant. So, you may want to consider adding a slow-release, balanced fertilizer to your plant care routine. But remember, resolving under watering and its effects is a slow process, so be patient and consistent in your attempts.

4. Pest infestation

Description Insufficient water supply leads to yellowing of calamansi leaves by affecting their physiological processes.
Solution Increase watering frequency to provide enough moisture for healthy leaf growth.

Calamansi leaves turning yellow is usually a sign of pest infestation. Pests such as aphids, scales, mites, and whiteflies suck the sap from the leaves, disrupting their normal function which often results in yellowing. More than often, these pests also produce honeydew, a sweet sticky substance that can lead to the growth of sooty mold, aggravating the overall health of the plant.

To alleviate this issue, you should first identify the type of pest. You can do this by examining the plant carefully. Once you determine the type of pest, it’s crucial to remove them. For minor infestations, you can do this manually or by blasting the plant with a strong stream of water. For more severe infestations, you may need to resort to an insecticidal soap or neem oil, which are effective and less harmful to the environment compared to harsh chemical pesticides.

Additionally, ensure to regularly clean up fallen leaves or decaying matter around your calamansi plant. This will help discourage the pests from breeding. Maintaining a healthy environment for your plant will not only help it recover from the current pest infestation but will also make it more resilient to future ones.

Why Are Calamansi Leaves Turning Yellow

5. Disease or infection

Description Increase watering frequency to provide enough moisture for healthy leaf growth.
Solution Apply organic fertilizer to the soil to provide necessary nutrients and prevent yellowing of leaves.

When Calamondin (Calamansi) leaves turn yellow, it could be due to a disease or infection. These diseases and infections destabilise the plant’s system, leading to discolouration. For instance, leaf spot diseases caused by fungi or bacteria usually manifest as yellow spots on the leaves. Left alone, these spots can grow larger merging together and cause the entire leaf to turn yellow.

These diseases are usually dealt with by pruning affected plant parts and applying appropriate fungicides or bactericides. Ensure that the plants are not waterlogged to discourage the growth of these pathogens. Also, it’s important to properly space your plants out for adequate air circulation which will discourage the bacteria and fungal growth. Remember to regularly sterilize your pruning tools to prevent spreading the disease to other parts of the plant or other plants.

If the yellowing is caused by viral infections, there’s really no cure. However, proper plant management and maintaining a healthy garden environment can reduce the effects on the plant and prevent it from spreading to other plants. Using disease-free planting materials is critical when dealing with viruses.

6. Environmental stress

Description Environmental stress can cause a disruption in chlorophyll production, leading to yellowing of the leaves.
Solution Provide adequate sunlight, water, and nutrients to alleviate environmental stress causing yellowing of leaves.

Environmental stress is a major factor that causes Calamansi leaves to turn yellow. This can be due to an array of reasons like insufficient light, high temperatures, improper watering, or nutrient deficiencies. Essentially, the plant struggles to maintain its natural functions and this manifests in the form of discoloration.

Firstly, you need to ensure that your Calamansi tree gets enough sunlight as it thrives in full sun. If your plant is indoors, try to place it near a window where there’s ample daylight. Avoid placing your tree in places with high temperatures that can cause it to lose moisture fast leading to yellowing of leaves.

Secondly, proper watering is crucial. Calamansi needs moderate watering — not too little, not too much. The roots should be kept moist, but not waterlogged. Overwatering can lead to root rot while under watering can stress the plant causing the leaves to yellow.

Lastly, the key solution for the environmental stress of nutrient deficiency is to provide your Calamansi tree with the necessary nutrients. In particular, a deficiency in nitrogen often results in yellow leaves. You may need to apply a slow-release, balanced citrus fertilizer that contains significant amounts of nitrogen, phosphorus, and potassium. Just ensure to follow the instructions on the package while doing so.

7. Natural aging process

Description The natural aging process of leaves causes them to turn yellow due to reduced chlorophyll production.
Solution Maintaining a healthy lifestyle with regular exercise and a balanced diet can slow down natural aging.

Yellowing leaves on your Calamansi tree could be a sign of nutrient deficiency in the soil. This deficiency is most often caused by a lack of nitrogen, but can also indicate a shortfall of other essential nutrients like iron, magnesium, or zinc. Nitrogen deficiency will cause the older leaves on your Calamansi tree to turn yellow first, before affecting the rest of the tree.

The reason nutrient deficiencies occur can be from not fertilizing the tree properly or because there’s something inhibiting the tree from taking up nutrients in the soil, like overly-dry or overly-wet soil conditions. Lack of nutrients in the soil limits the tree’s ability to conduct photosynthesis, causing the leaves to yellow.

To correct a nutrient deficiency, apply a slow-release citrus fertilizer according to the package instructions. Make sure the product includes zinc, iron, and manganese. Regular watering will also help provide optimal conditions for nutrient absorption. Avoid overwatering, which can lead to root rot, as it can also inhibit the uptake of nutrients.

In case the yellow leaves persist after correcting nutrient levels and watering methods, it may signify a possible pH imbalance in the soil inhibiting nutrient uptake. A soil test will help determine this. If a pH imbalance is discovered, you could add sulfur or lime to decrease or increase soil pH, respectively, again following package instructions.