Why Do Aloe Leaves Turn Yellow?: Treatment Tips


Aloe is a favorite of many indoor gardeners. It is easy to grow, pleases with bright greenery all year round, and is also a real “Natural-pharmacy”.  There is a multipurpose use of aloe leaves.

Important conditions for the preparation of masks, lotions, and extracts: the leaves should be healthy, juicy, saturated in color. When the aloe leaves suddenly begin to turn yellow and dry, gardeners urgently need to take measures so that the aloe does not die.

Why Do Aloe Leaves Turn Yellow? Aloe leaves turn yellow by care mistakes and improper watering. This makes indoor plants appear stressed and lead to the symptom. In serious cases, Aloe Vera can die. If the nutrient supply is not enough or the location does not match the needs of the plant, many problems will appear. Leaves turning yellow is the most common consequence.

In addition, there are a number of factors responsible for this.

Lack of light

The succulents do not demand any specific location to live. But they suffer from both excess and lack of sunlight. In the hot summer, burns from the sun often appear on the leaves.

But much more often the leaves begin to turn yellow in the fall and winter. People believe that at this time, aloe is resting and therefore does not require frequent watering and excessively high temperatures. The plant will feel best in a cool, semi-dark room. In most cases, it is this mistake that becomes fatal to the aloe plant.

I will explain why this is a mistake to think like that. So that you can save your aloe leaves from turning yellow.

Aloe Vera plant in less light condition

Therefore, you to understand the basic requirements of the plant for light:

  1. Aloe needs year-round lighting.
  2. You have to ensure light at any time of the year. Because both in winter and in summer, direct rays burn your aloe. On the other hand, shade does not allow photosynthesis normally. It is light that triggers the reaction of photosynthesis.
  3. In summer, aloe grows well even on the balcony. The plant normally tolerates temperature changes and shading. But in winter you should place the plant in southern windows.

Important! The daylight requirement of this succulent is at least 15 hours. In winter, you need to provide artificial lighting to your aloe healthy. And Yes! The plant can do photosynthesis in artificial light.

It is not necessary to install an additional light source for a plant. Even if your apartment is not too sunny. You should move the pots periodically for a better light angle. And this will be enough to keep your plant healthy.

The Temperature Problem

The best temperature for aloe in spring and summer is around 25°C/77°F on average. However, your aloe can normally survive a drop to 18-20°C/64.4-68°F even during intensive growth. So, it is therefore quite comfortable on your balcony or in the garden in summer.

Here are some cases when your aloe plant leaves will be negatively affected:

  • Autumn cooling with a sharp drop in temperature to 10°C/50°F;
  • Prolonged (more than 3 hours) stay in the sun in hot weather – above 29°C;
  • Sudden temperature changes, this may cause with artificial heating
  • A sudden change in temperature: the plant is exposed to the sun in summer in hot weather, which will definitely cause burns.

Special feature! Aloe can survive even at 12°C heat. But you should remember that the temperature should fall gradually. Otherwise, stress will have a bad effect on the succulent.

Your aloe vera plant does not require much effort, but the basic requirements of care are still necessary. Like any living organism, aloe will respond to the favorable conditions with an abundance of new leaves and branches.

Wrong Nutritional Supplements

If there is any shortage of nutrition supply, you can see the visible effects. You may notice the yellowing of the sharp leaf tips and thin of the plates.

You have to ensure fertile soil that is well-drained and moist for succulents. It is rich in both minerals and organics.

Special feature! You should not fertilize aloe for six months after transplanting. It has enough nutrients from renewed soil.  Young plants also do not need extra fertilizer applications.

Yellow leaves signal that:

  • Fertilizers are applied too often, which is not good for the root system;
  • The plant has not been watered abundantly before the fertilization. As a result, the root system gets burn;
  • Aloe was not watered under the root with a liquid solution. But the leaves and stem were sprayed, which is not acceptable;
  • The soil was fertilized in winter when the succulent is resting or immediately after purchase. Or you did it more often than once in 3-4 weeks.

All is good in proper proportion; you should be careful when feeding the home plant. If leaves turn yellow, thin and shallow then your aloe needs extra nutrition.

Aloe Vera leaves turn yellow due to wrong nutritional supplements

However, minimal application of fertilizer does much less harm to the aloe.

If your aloe substrate is abundant in nutrition, then you should not fertilize the soil again. Even if your aloe is not looking good. Because this will cause more damage to your plant.

Common yellowing leaf disease

The indoor aloe may wither and fade due to diseases. In natural conditions, succulents are less vulnerable to diseases. But your artificial indoor environment can harm them, creating favorable conditions for diseases.

Root rot

This is a very dangerous disease for your indoor aloe. This can kill your plants before you get enough time to save it. But there are ways to save aloe from root rot.

Here are the reasons that can accelerate the occurrence of root rot disease.

  • Ignoring the requirements for aloe transplantation,
  • insufficiently drained soil,
  • Solid soil causes moisture stagnation which provokes the appearance of root rot.

When the disease occurs, you will find the following symptoms:

  1. Leaves become thinner, look watery and withered, old ones fall off.
  2. The color gradually changes from juicy green to yellow.
  3. Aloe stem looks thin and very fragile, easily breaks off at the base.
  4. The flower is slowly growing.
  5. The soil in the pot starts to smell unpleasant.
root rot disease of aloe

These signs suggest that your aloe has been affected by root rot. Dying roots are not able to give aloe normal nutrition. This contributes to the appearance of all these signs.

Dry rot

Dry rot of aloe vera plant. Whole leaf dies after drying and curling.

You will observe a slightly different picture if aloe is affected by dry rot. The disease progresses very quickly.  Almost always the result is the death of the plant.

Initially, you will see that only the tips of the medium-sized leaves dry out rather well developed. Then the whole leaf dies after drying and curling.

From one branch, the disease passes to another. There’s almost nothing you can do. The culprit of the situation is a fungus that destroys aloe from the inside, drying it out.

If you understand what happens at the very beginning of the disease, then you can try to separate several healthy layers and root them. You cannot save the whole plant even when transplanting it into new soil and treating its roots.

Disease prevention

Diseases such as root rot and dry rot are caused by improper care for aloe. Wrong selection of soil or irregular watering conditions.

Root rot threatens succulents planted in heavy soil. Because it retains moisture. If you water your aloe irregularly, then a crust will form on the soil surface that does not allow oxygen to pass through. This causes acidification of the soil and creates favorable conditions for the reproduction of pathogens that destroy the roots.

Dry rot appears if your pot soil is very light and does not retain enough moisture. The root of the plants does not receive enough water to feed the stem and leaves. As a result, constant stress weakens your aloe. So, your aloe can not resist the fungus, which began to develop in the stem and leaves. The fungus destroys every cell of the plant.

Warning! The natural environment of aloe is warm countries, where it reaches a huge amount of light, well-aerated moist soils. You should keep in mind these things when deciding to purchase an aloe plant for your indoor garden.

If on top of everything else you force your aloe to survive in a small pot, where the roots are cramped and the layering has nowhere to root. Yet you did not transplant for years, the diseases are inevitable.

Transplanting aloe vera plant to a bigger and decontaminated pot

Pests

A real disaster for your indoor aloe is pests. Now and then pests attack your plants. Since they can not only damage but also destroy green leafy areas. As a result, ale leaf turns yellow.

Spider mite

Spider mite insect on aloe vera plant

If you find yellowing of your aloe leaves and dead leaf spots, it is proof that your aloe vera plant is attacked by a spider mite.

The dead spots will unite and make the whole leaf yellow. Slowly the entire leaf will be affected. With such a tiny size – about 1 mm, the insect causes a lot of damage. They settle in a colony on the underside of young leaves. Then the insect sucks out its gentle juice and exhausts your plant.

If yellowness turns into red, and then the leaf dies. You should act immediately:

  • move the plant away from others, isolating and preventing infection;
  • treat the plant leaves with Insecticidal Soap which is designed to control pests;
  • repeat the treatment of all leaves twice with an interval of 5 days.

Attention! It’s important to do it on the balcony, in the street or in an open space. The insecticidal soap is not as dangerous as chemical insecticides. But still, it can irritate your eyes and skin. So, wearing gloves and protective eyeglass can protect you from the possible effects of the insecticide.

In addition to the long-lasting effective pesticides, you can also use homemade recipes. You can make a very easy and simple pesticide using laundry soap and onion peel. Mix them together and carefully wipe each leaf of the plant. Easy, cost-effective and safe method to fight against plant-insect.

The influence of scale insects

scale insects attack aloe leaves

The scale insect looks like a small bump on the stem or leaf of a plant. They settle in a colony and sucks out the juice. Thus, it deprives the aloe leaves of growth and development. The leaves in the damaged areas dry out. In severe lesions, the leaves turn yellow and then dark reddish, later brown spots appear on them. Then the leaf dies off.

Immediately isolate the plant from the rest. Thoroughly treat the place where it stood, and the plant itself with garlic tincture. You can use alcoholic solutions to wipe aloe vera leaves and plants. This will help save your plants from pests.

Mealybug

mealybug attacks aloe vera leaves.

You may notice that the tips of the aloe leaves have started to turn yellow.  The stem is suddenly covered with pieces of wax. Then you can be sure about the attack of mealybug. The areas covered by this pest begin to rot as there will be a lack of oxygen.

Attention! Mealybug does not like moisture. So sometimes it is enough to treat the plant with special formulations of alcohol or a little apple vinegar to control it. Use it carefully so as not to burn the aloe.

After thoroughly wiping every centimeter of the succulent, you will need to put it in the shade for a few days. This will increase the chances of getting rid of the mealybug. Within 10 days you should repeat the treatment 3 more times using normal wet wipes.

What to do to prevent pests?

Prevention of diseases and pests is much simpler than fighting them and their consequences. To protect the plants, you just need to carefully monitor them, observing all the changes. And also take precautions when transplanting or the appearance of new “neighbors” on the windowsill. Transplant, fertilize and treat at the right time. Water on time and does not violate the temperature regulation.

It is important to adhere to these requirements when caring an aloe vera plant:

  1. If you are using old pots for transplants, you should remember to treat them with disinfectants.
  2. When pulling out new branches, make sure to choose a larger container. So that the roots have enough room for growth.
  3. If you want to use garden soil, you should warm it up in the oven or poured with boiling water to destroy pests.
  4. Wipe aloe leaves weekly and inspect the stem. Not only will you be able to recognize the warning signs in good time, but you can also prevent the occurrence of diseases and pests.

A strong, healthy plant can easily withstand both stress factors and various diseases. You can keep your aloe plant healthy only by naturally taking care of them. With proper care, monitoring the condition of the soil, providing favorable conditions, your aloe vera will delight all year round.

Useful video

In this video, you will learn about all the details of aloe care, including planting and propagation.

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