What to Do When Lemon Balm Leaves Turn Yellow? Cause Analysis and Solutions

The primary cause of lemon balm turning yellow is generally a lack of water in the plant. Although it is a relatively drought-tolerant plant, if it is not watered for a fairly long time (more than 15 days), the most obvious sign is that the plant begins to turn yellow. This is one cause.

If it lacks light, this can also cause lemon balm leaves to turn yellow. Lemon balm is quite commonly grown in indoor environments. If growers do not actively give it sunlight, light will rarely reach the flowerpot, so long-term lack of light conversion is also an important cause of leaves turning yellow. Generally, at least once or twice a week it should be placed in the sun to dry out so this does not happen.

If potted lemon balm lacks fertilizer and nutrients cannot keep up, the nutrients for the top leaves cannot keep up and cannot be supplied to the upper leaves in time, which can also cause lemon balm leaves to turn yellow. At this point, growers need to topdress fertilizer in time. The amount does not need to be too much; proceed slowly according to changes in the plant.

If lemon balm is not trimmed or pruned for a long time, then it will keep growing. You should know that the quality of lemon balm leaves gets worse the higher up they are, so problems easily arise and the leaves turn yellow. Therefore, prune it at the right time and keep it in a short but luxuriant state, which is better.

Actually, lemon balm itself is quite drought-tolerant. Generally, when it lacks water, you should replenish water for the lemon balm in time. Usually, watering once every half a month is enough.

Lemon balm itself is a light-loving plant. If it has not seen light for a long time, of course it will turn yellow. If the room has good lighting, you can place the lemon balm in a spot with sunlight. If the room has relatively poor lighting, then at least 1 to 2 times a week it should be moved into the sun.

When the lemon balm grows too long, the top leaves need to be pruned at the right time to keep it in a short but luxuriant state, which is best. Apply a little fertilizer at the right time, but not too much, otherwise it will also cause the leaves to turn yellow.

What to Do When Lemon Balm Leaves Turn Yellow?

Summary of Causes

The Plant Lacks Water

The primary factor to consider when lemon balm turns yellow is that the plant lacks water. Although it is a relatively drought-tolerant plant, if it is not watered for a fairly long time (more than 15 days), the most obvious sign is that the plant begins to turn yellow. This is one cause.

Lack of Light

Another cause may also make lemon balm turn yellow, because lemon balm itself is quite commonly grown in indoor environments. If growers do not actively give it sunlight, light will rarely reach the flowerpot, so long-term lack of light conversion is also an important cause of leaves turning yellow. Generally, at least once or twice a week it should be placed in the sun to dry out so this does not happen.

Lack of Fertilizer

The last cause is a lack of fertilizer. The way to judge is to look at whether the yellowing leaves are at the top of the plant or in the middle and lower part. If they are at the top, it means the soil fertilizer is insufficient and cannot be supplied to the upper part, causing it. At this point, growers need to topdress fertilizer in time. The amount does not need to be too much; proceed slowly according to changes in the plant.

Solutions

Plants, like humans, when sick, if you want to know how to treat them, you must first know why they got sick. So here is a summary of several causes of lemon balm leaves turning yellow to share with everyone.

What to Do When Lemon Balm Leaves Turn Yellow What to Do When Lemon Balm Leaves Turn Black

Many people grow lemon balm at home to absorb harmful gases such as formaldehyde, radon, benzene, and ammonia. But during the growing process, some problems are encountered, such as lemon balm leaves turning yellow and lemon balm leaves turning black. What should we do? Below we will solve these two problems for everyone.

What to Do When Lemon Balm Leaves Turn Yellow

1. Natural Phenomenon

If lemon balm leaves turn black, there is no need to worry. It may be a natural phenomenon. Just pluck off the black lemon balm leaves.

2. Toxins Too High

Even though lemon balm is a so-called "toxin-absorbing" herb with a strong ability to absorb harmful gases and purify the air, its air-purifying function is also limited. If lemon balm cannot purify toxins quickly, causing toxins to accumulate too much in the lemon balm, this will cause lemon balm leaves to turn black.

3. Too Little Light

If lemon balm is placed in an environment that is too shady for growing, the lemon balm will remain in an unsuitable environment for a long time, its growth will gradually weaken, and then lemon balm leaves will turn black. Simply place the lemon balm in a sunny place for care.

4. Too Much Dust Accumulation

If too much dust accumulates on the surface of lemon balm leaves, it may be infected by pathogens present in the dust, causing lemon balm leaves to turn black. Simply move the lemon balm to another place for care and pay attention to cleaning and care work for the lemon balm in normal times.

5. Insufficient Nutrients

Unreasonable fertilizer and water cause insufficient nutrients in lemon balm, leading to lemon balm leaves turning black. You can fertilize the lemon balm to increase its nutrients, but do not apply too much or too concentrated fertilizer. When watering the substrate, water thoroughly only when the surface soil looks dry.

What to Do When Lemon Balm Leaves Turn Yellow

1. Calcium and Iron Deficiency

Loosen the soil a bit and do not rush to water. If the old leaves of lemon balm are green and the new leaves are yellow, this is yellow-leaf disease caused by calcium and iron deficiency. Calcium deficiency will hinder the synthesis of nitrogen fertilizer in lemon balm, making it impossible for new leaves to get nutrients, causing nitrogen deficiency and making lemon balm leaves turn yellow. Iron deficiency will prevent chlorophyll from forming in lemon balm, causing lemon balm leaves to turn yellow. It is best to go to a flower shop and buy calcium magnesium phosphate, ferrous sulfate, and compound fertilizer. Mix a small amount of compound fertilizer with calcium magnesium phosphate and bury it in the soil, and spray ferrous sulfate on the leaf surface. Use them according to the instructions or as the shop owner teaches you.

2. Improper Watering

If lemon balm is watered improperly by pouring water directly on the leaves, it easily causes lemon balm leaves to turn yellow. The correct watering method is to water at the place where the roots and stems enter the soil.

3. Too Little Watering

Lemon balm itself is quite drought-tolerant, but it should be watered once every half a month. If it is watered too little, it will cause lemon balm leaves to turn yellow. Simply water the lemon balm.

4. Too Little Light

Lemon balm is relatively shade-tolerant, but if it has not been given sun for a long time, the lemon balm lacks sunlight, which will also cause lemon balm leaves to turn yellow, because the chlorophyll in the leaves can only become green through sunlight, so simply supplement light. Lemon balm should be given one day of sun every half a week and cannot go without sunlight all the time.

5. No Pruning

If lemon balm is not pruned, it will keep growing, but the quality of lemon balm leaves gets worse the higher up they are, so problems easily arise, and lemon balm leaves turning yellow may also occur. Lemon balm should be pruned at the right time, and keeping it in a short but luxuriant state is best.