Why are some leaves of your plant yellow?

Are some of the leaves on your plant yellow or turning dull? If you are asking yourself this question, your plant is probably not doing well. Many factors can cause your plant to change from its natural green to a strange yellow. Keep reading and meet them here.

Reasons why some leaves of your plant are yellow

Plant metabolism is very delicate and can be affected by multiple factors. It can even be ruined by stress. Although it is easier to treat their problems than that of other beings, improper management of environmental factors can harm them.

The yellow color in the leaves is usually a warning sign. It can occur due to natural processes, but also due to lack or excess of light, water or nutrients. Another factor that affects is the imbalance of the pH.

Unfortunately, many problems cannot be solved simply by adding nutrients to the substrate. Adding specific nutrients can result in a lack of absorption of others. That is why we consider that the requirements of the plants are complex.

Flowering

During flowering it is very common that some leaves of your plant are yellow. This is because the plant needs more energy and nutrients in the buds. Therefore, it diverts nutrients from the leaves to make them reach the buds and flowers.

This can happen to even the most experienced growers’ plants. But it is true that with better nutrition and control, the discoloration of the leaves can be stopped. Nutrient-rich supplements can be very helpful in these cases.

Nitrogen deficiency or excess

Nitrogen deficiency in marijuana plants is a very common problem. But relatively easy to treat. If you don’t balance it, your plant won’t be able to properly absorb sunlight.

Nitrogen is very important in all plants, but particularly in marijuana. Without it the stems and leaves cannot develop and grow properly. Nitrogen deficiency is also synonymous with low quality chlorophyll and low protein count.

The easiest way to tell if your plant is lacking nitrogen is by leaf coloration. When nitrogen is lacking, the oldest and largest leaves become uniformly discolored and progressively die.

When from germination your plant lacks nitrogen, you could see poor growth and further weakness. This will manifest itself in the total size of the plant and in its production, which will be less.

Also excess nitrogen can cause imbalances. Among them, a growth of the stems superior to what the plant can support. This is very dangerous because the plant does not grow proportionally. The foliage grows very tall, but the roots maintain their size.

When a plant has a lot of nitrogen it spikes and breaks. Opportunistic pests like fungi can wreak havoc on your leaves. All this can bring a weakening that will be observed in production.

The solution for excess nitrogen is to water the soil abundantly so that the nitrogen comes out. This could cause some problems due to excess water, but apart from replanting there are not many options.

Solving nitrogen deficiency is easier. You just have to put nitrogen to the plant and wait. You can also use a nitrogen fertilizer for better results. You should only avoid ammonium nitrogen so as not to interfere with nutrient absorption.

iron deficiency

Iron deficiency is relatively common in plants. In part, this is because it is difficult to absorb. To guarantee a correct absorption we must supply iron in a way that it can be absorbed correctly. Not only is it enough that the earth contains it.

Iron is very important in the metabolism of marijuana plants. Without it, chlorophyll cannot be synthesized properly. This can lead to light absorption problems, a possible cause of leaves turning yellow.

The youngest leaves are the most affected by the yellow color, but the veins also tend to suffer the consequences. In addition to the yellow color on the young leaves, you will be able to see shoot growth between the veins of the plants.

In extreme cases, larger leaves could also turn yellow or even white. When this occurs, leaf necrosis can occur. It can also happen that growth and flowering are slowed down.

Stress and accelerated growth can also cause iron deficiency. This is why it is important to maintain constant conditions and assess for excess nutrients. The pH is also a decisive factor, but the condition of the roots must also be considered.

If the roots have too much water or too much light, they may not be able to properly absorb iron. It can also happen that the excess of light favors the growth of algae that keep all the iron.

Symptoms of iron deficiency are usually not that important. Many times they are due to a lack of transit of this mineral. In these cases, it can resolve itself, which is ideal. There is only an interference in the functions of the plant when the deficiency is chronic.

Fortunately, the harvest and production do not suffer the consequences of this imbalance so easily. If the lack of iron is solved in time, the symptoms are easily eliminated and are perfectly reversible.

Specific fertilizers for iron deficiency in plants can improve this situation. Spraying chelated iron solutions on the leaves also works. Iron uptake in roots is more complex.

calcium deficiency

If you were wondering why some leaves of your plant are yellow, the lack of calcium is another possible cause. Calcium is found throughout the plant, regulates cell function and metabolism.

It is very important that plants can absorb enough calcium. This is because not only in a component of the plant itself. Also because the calcium absorption mechanism is more complex than that of other nutrients.

When there is a calcium deficiency in your plants, you will see leaves with yellow spots. If you look carefully, you may even see a deep brown rim around the spots. The yellow spots could also be slightly brown.

The spots will show up on the largest and oldest leaves. It probably won’t be the top leaves that suffer, but the middle ones. The spots will start out as small dots and will progressively expand and increase in number.

In addition to the spots, your plant will have a scrawny appearance and slower growth. New leaves, as a result of poor health, may develop weak and thinner than usual.

One of the worst consequences of a lack of calcium in marijuana plants is a poor harvest. Even in case of harvest, brown or discolored pistils and tips smaller than normal can be observed.

Calcium deficiency problems can be caused by fertilizer or soil problems. They can also be associated with an excess of other nutrients or with poor or too abundant moisture.

Among the solutions you have at your disposal are the enrichment of the soil and the improvement in the use of fertilizers. You just have to be careful not to over-increase your calcium levels. Too much calcium could mess up the metabolism of other minerals.

Sulfur deficiency

Sulfur is a very important element in the synthesis of proteins, hormones and vitamins in plants. Without sulfur, cell fluid and seeds cannot be produced properly and cannot perform their functions.

Sulfur deficiency problems rarely occur in plants grown outdoors. Also almost all types of soil have acceptable levels, so a deficiency is rather rare.

Signs of sulfur deficiency can be greatly intensified if left untreated. The first is a light green coloration in young leaves. The problem is that since these leaves are lighter, the deficiency is more appreciated in the larger and more developed leaves.

The leaves can even turn from light green to deep yellow. The lack of sulfur can also affect the color of the petioles, which become more purple. When the lack becomes chronic, the predominant colors are deep purple and yellow.

These problems can be avoided if you plant directly in the soil or take care of the pH in your pots. Even a high amount of calcium can be a problem leading to sulfur deficiency.

Excessive sulfur can also be a problem, so be careful when trying to turn up the sulfur. An excess of sulfur can make your plant grow less. It can also cause extreme salinity, causing your plant to darken.

potassium deficiency

Potassium is a very important mineral for plants. Without it, the water does not have an adequate transport and there is no adequate opening of the stomata. Carbohydrates are also not in proper balance. Without enough potassium, plants cannot grow healthys and strong.

When there is potassium deficiency, the leaves lose their shine. You can see stunted-looking branches: with abundant, but thin leaves. The shoots may have gray edges and dry twisted.

And here comes the part that interests us: why some leaves of your plant are yellow if potassium is missing. This effect may start only at the edges, but will spread later. Small dots of necrosis may also begin to appear. In chronic cases, there is a decay of the leaves. The harvest is poor and the buds are very small.

As a consequence of the damage caused by lack of potassium, there may be little vaporization. This ends up burning the leaves due to too high a temperature. This process is usually verified at the edges of the leaves.

These disorders can be caused by different causes. The first of these is the incorrect use of fertilizers. It can also be due to a soil that has “fixed” potassium or excess sodium. In all three cases it is best to consult an expert.

Depending on the causes of the lack of potassium, different measures can be taken. The first is to improve the EC of the soil by washing it. The second and clearer is to add potassium through potassium nitrate. Ashes, or even charred wood or manure, can also be added.

Potassium is very easily absorbed. If the steps you took worked, you’ll probably see results within a few days. You just have to add the potassium carefully to avoid salinizing the soil and avoiding other deficiencies.

Too abundant or insufficient watering

Plants need an efficient and consistent watering pattern. Without it, they can hardly grow and develop properly. Marijuana is native to humid places, but generally with little precipitation.

If you water too much, we give you some tips to know what to do in case of excess watering, although you run the risk of rotting the roots of your plant.

Once your plants sustain such damage, recovery will be impossible. It may also happen that your plant has little watering. In this case, you will have a smaller and less productive plant than normal.

One of the main symptoms of too much or too little water is the appearance of some yellow leaves. This is because it cannot absorb enough oxygen, so it does not metabolize essential nutrients for the creation of chlorophyll.

The problem of irrigation can be solved in several ways. The easiest is with a substrate moisture meter. But they can also see how much water your plants are absorbing by lifting the pot after watering.

Ph too high or too low

To solve the pH problem, the first thing you can do is buy a pH meter. The tapes are very effective and will get you out of doubt quickly. The proper pH of the substrate is between 6 and 7. But if it is a hydroponic culture, a pH of 6.5 is not inappropriate.

If you have a higher pH, the ideal is to wash the roots with clean water. You can also fertilize your plants with a fertilizer that promotes a neutral pH. To reduce it we have the pH reducer for marijuana plants. In the opposite case, you can add minerals, but it is best to pay with products that fit your case.

Lack of light

The lack of light is usually a very common answer to the question Why are some leaves of your plant yellow? And it is that many indoor growers have this problem, especially if they are just starting out.

The solution for this problem is relatively simple. If you grow indoors, the part that receives less light will probably be the most affected. What you have to do is look for HID lighting. LEDs can be useful, but not as the main light source.

Outdoors, yellowing can also occur due to lack of light. Although it seems strange, it is so. The higher leaves can cover the lower ones. When the leaves lack light, they cannot adequately carry out their processes and the color can be affected.

Malnutrition

The plant, like any living being, depends on the reception of nutrients. If your plant does not receive the necessary amount of nutrient, it is more exposed to possible attacks.

Such as pests or that are more critically affected by temperature or lack of sun. For this it is necessary to provide many nutrients to your 420. At Madamegrow we have a wide range of 100% organic fertilizers.

For example, our Bone & Muscle is perfect for nourishing your plant and providing calcium and magnesium. 2 Secondary macronutrients essential for the vegetative growth and development of marijuana.

• Provides all the calcium and magnesium necessary for the development of your plant.
• Strengthens your plant and promotes growth.
• Improves nutrient absorption.
• Increases the defenses of the plant.

If your marijuana plant is taking on a yellowish pigmentation, you already know what it could be due to and the organic nutrients that can solve it. It is recommended that you act as quickly as possible so that the plant does not suffer irremediable and unfavorable consequences.

Remember! At Vegetal Bioplant we are specialists in biotechnology applied to marijuana and therapeutic cannabis crops.