Why My Aglaonema Osaka Leaves Are Turning Brown?

Why My Aglaonema Osaka Leaves Are Turning Brown?

When the leaves of your plant are turning brown then this may mean that it has a disease or is going to die. If you have any leaves that have turned brown, then it may be wise to repot them into a new container.

This problem is not very uncommon and can happen because of a number of things such as improper watering, over watering, insufficient nutrients, poor drainage and too cold temperatures resulting in the leaves dying. The following are the reasons that causes Aglaonema Osaka leaves to turn brown;

Too much light:

Aglaonema Osaka grows best in bright light, but too much light can cause the leaves to turn brown or dry out. If the plant is receiving too much sunlight or artificial lighting, then it may turn brown and wither away because of how intense the light is. When this happens, then it is important to put them in a shady area where they can rest and recover.


Over watering will cause the leaves of the plant to wither away and turn brown because of how much water the plant is receiving. A good fertilizer is also important for your plant so that they can grow strong and stay healthy.

Over watering might cause the roots to rot more easily in case they are not kept at a steady level of moisture, which is why it’s important to keep them properly moist and in a draining soil.


Over fertilizing your plant can cause the leaves to wither and turn brown because of how much nutrients it is receiving. The plant may develop signs of poisoning like vomiting or diarrhea due to the buildup of chemicals in their body, which is why you should avoid over fertilizing them. A good fertilizer will be able to keep your plant strong and healthy so that it does not have these problems.


When you are not watering your plant enough, then the leaves may begin to wither and turn brown. This happens if the soil is not being replenished with water because of how less water they receive. If you continue to do this, then they will die because their roots do not have enough water in them to stay alive.

Make sure that you are always keeping the soil moist like when you first bought it and keep track of when you watered it last so that you can see when it needs more moisture.

Low humidity:

Aglaonema Osaka benefits from a high humidity level in their environment because this will help to protect them from fungi and disease. If the humidity levels in your home are too low when you plant them then it can cause the leaves to turn brown or dry out because of how dry the air is. Make sure that you are keeping them at a completely high humidity level and not letting it lower.

If you keep them at too low of a humidity level, then they may begin to die because of how dehydrated their roots can become.

High temperature:

When your plants outside or in a greenhouse or other indoor environment, then you should make sure that the temperature is comfortable for them to grow. Too high temperatures can cause the leaves of your plant to turn brown because of how hot and dry it is. If they are left in too high of a area where the temperature is too high, then it may cause them to dry out and die.


Aglaonema Osaka will benefit from a fertilizer that is rich in nutrients because it will be able to keep them strong and healthy. If the plants are not receiving enough nutrients through their roots, then they will begin to wither and turn brown because of how much they are lacking. You should always make sure that you are giving it the proper amount of fertilizer so that they can stay healthy.

Can You Propagate Aglaonema Osaka In Soil?

You can propagate your Aglaonema Osaka in soil, however, it is not recommended because they usually do not grow back quite the same as they were before. Propagating in soil is a good way to start new plants because you can use them or give them away to family and friends. You can propagate in soil by cutting the plant at the branch tip.

Then, you will want to allow them to callous over for two days and then place them in some dampened perlite or sphagnum moss. You should find the stem of the plant and make sure that it has no leaves.

You will want to plant your Aglaonema Osaka cuttings in a pot filled with damp soil. To save money you can use sawdust and wood chips for a soilless medium, but perlite or sphagnum moss is always a better choice because it has more nutrients than sawdust and wood chips.

After your soil is ready, you will want to give them fresh, nutrient rich water every two to three weeks until they have taken root. You should also give them some extra nutrients and fertilizer during their growing process. When the top of the plant begins to grow, then it is time to repot it into a bigger container so that they can continue growing.

What Is The Best Soil For Aglaonema Osaka?

Aglaonema Osaka needs to be in a growing medium that is rich in nutrients. A good growing medium will also have enough water to stay healthy. You should also make sure that the soil is completely moist so that it does not dry out quickly.

Keep your growing medium moist and give them fresh, nutrient rich water every two to three weeks. A well-drained growing medium is also important because it will help to rid the plant of any disease and it will also help plant to live longer.  All you need to plant and grow Aglaonema Osaka is regular potting soil or a soilless medium.

You will want these plants in small pots because they can become large as they grow. If you put them in too large of a pot, then they may have difficulty growing properly because their roots will not be able to spread out like they need to in order for their leaves and stems to develop properly.

The soil should be light and well-draining because they need to be able to have enough nutrients and water to keep them healthy. The best growing medium will also have enough fluid in it so that the roots of the plants can keep living instead of drying out. You should make sure that you are planting your Aglaonema Osaka in a pot or container that has a drainage hole so that their soil does not become too wet or too dry.

What Is The Ideal Temperature For Aglaonema Osaka?

The ideal temperature for Aglaonema Osaka is between 65 and 85 degrees Fahrenheit. It is important to keep your plant in an area with this temperature or higher because if it drops down to 60 degrees Fahrenheit, then you will start to notice that their leaves are starting to turn brown and become damaged.

When the temperature drops below this, then they may have problems because the roots of the plant will freeze. If they freeze, then you will be forced to remove the entire plant from its pot so that you can thaw out the roots. Temperature is essential for proper growth because if it is too low, then you are going to notice that the leaves of your plant will start to become damaged and die back.

You should never expose your plants to temperatures that fall below 60 degrees or above 85 degrees Fahrenheit because it will begin to damage the roots and leaves of your plant and cause them to die. Proper temperature help Aglaonema Osaka to promote bushy and blooming growth.

Is Aglaonema Osaka Hardy?

Aglaonema Osaka is fairly hardy because they can withstand a variety of temperatures and environmental conditions. They can tolerate temperatures that fall between 65 and 85 degrees Fahrenheit, but make sure that you are keeping them in an area where the temperature does not drop below 60 degrees or rise above 85 degrees Fahrenheit.

The ideal temperature is between 65 and 85 degrees Fahrenheit. They will start to show signs of damage if their temperature drops below 60 degrees or rises above 85 degrees Fahrenheit.

Aglaonema Osaka is an easy plant to grow and maintain because it is considered a tropical plant. It can be grown indoors or outside because they are very versatile and are hardy. If you want the best-looking leaves, then you will want to keep them indoors in a warm, humid environment.

If you want them to bloom, then you should leave them outside where the temperature is warmer and the humidity levels are higher. The sunlight does not have to be direct or strong because it is not going to make them grow faster or produce more flowers.

You can place your plants in full sun exposure and plan on watering every day. If you want them to produce more stems, then you will want to give them plenty of nutrients and water so that they can thrive.

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