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Why Is My Begonia Dropping Leaves? (5 Causes & Solutions)

Begonias are common in homes and outdoor gardens. There are more than 1000 species and various types and hybrids.

Begonia comes in different shapes, sizes, and colors, which makes it easier for people to find the right begonia for their homes.

Some people prefer crooked, patterned, and colorful foliage, while others love the fibrous type with their beautiful colors.

Other types of begonia include rhizomatous, tuberous, and cones.

Why Is My Begonia is Dropping Leaves

However, just like any other plant, begonia might develop problems such as dropping leaves.

Other common begonia issues include curling leaves, flowers turning brown, leaves turning brown, and leaves turning yellow.

There are several practices that you’ve to carry out to ensure that your begonia is healthy and strong.

If your begonia has been dropping leaves and you don’t know why or what to do, you’re in the right place.

To simplify things for you, we’ve highlighted the main causes of begonia dropping leaves and what you should do.

1. Overwatering

The main reason why begonia leaves drop is because of overwatering.

Even though regular watering is vital for plants, begonia needs even watering.

And that’s one of the most challenging parts about growing begonia indoors in pots or containers.

Instead of watering begonias daily – for instance, every morning or evening; you should check soil moisture.

This can be done by using your finger or a tensiometer to find out the level of moisture in the soil.

Watering your begonia daily may make the soil extremely wet, which will make the leaves to rot and drop.

That’s why it is always a good idea to plant your begonia in a container with drainage holes so that water doesn’t remain stagnant and suffocate your precious plant.

The idea is to get the soil slightly wet ad not muddy.


Your begonia leaves will drop off if you over water or even underwater them.

What To Do

Add the necessary water needed for your begonia plant. It should not be excessive or less. If there is excess water, you should get rid of it.

Also, don’t starve your plant by not watering it as needed.

2. Worm Infestation

Another thing that can cause your begonia to drop leaves is attack by worms. A worm infestation will not only make your leaves dry but even kill the whole plant.

So, watch out for worms on your plant and remove them as soon as possible.


Worms attacking your begonia. The worms that are likely to feed on your begonia plant are cutworms.

What To Do

Get rid of the worms before they cause severe damage to your plant. These can be detected by inspecting your plant’s foliage and stem. Worms are active at dusk when they get out to feed.

3. Lack Of Humidity

Plants need humidity to make food or photosynthesis. That’s not an exception for Begonias.

Since they are tropical plants, they need a lot of humidity to grow healthy and strong.

If you’re growing begonia outdoors, this shouldn’t be a problem. On the other hand, if you’re growing them indoors, then you should be worried.

This is because as you warm up your house, you dry the air, which is trouble for the plants.

As a result, this could cause the leaves to dry and drop s they lose a lot of moisture.


If you notice that your indoor begonia plant is dropping leaves in winter, this shouldn’t come as a surprise.

It is an indication that the level of humidity is very low.

Most people warm their houses in winter without knowing that they are killing their plants.

What To Do

To relieve your plants from this stress, you should get a humidifier to keep the air moist.

Alternatively, you can get a mini-greenhouse where you can grow your plant.

4. Repotting

Have you repotted your begonia just recently? Maybe it’s the reason your plant is dropping leaves.

Improper repotting of your begonia plant can cause the leaves to drop.

One of the common mistakes begonia growers make is repotting during winter or summer.

It is recommended to repot your plant during spring when it’s not too hot or too cold. Another mistake is repotting in the wrong pot/container size.

If the plant has outgrown the pot, you should select a larger size pot for smooth growth.

The ideal pot for your begonia should have a drainage hole in the bottom.


The leaves of your begonia plant will drop if you repot at the wrong time and in the wrong pot size.

What To Do

Repot during spring and put the plant in a slightly larger pot. Don’t repot if it’s unnecessary as this will make your plant to struggle to grow.

5. Lack Of Light

Light is crucial for the growth of any plant. They need it for photosynthesis.

For this reason, you should ensure that your begonia gets the right amount of light for it to flourish.

Nonetheless, begonias don’t need a lot of light as they may suffer from excess light.

But some varieties need more light than others. Most begonias don’t need a lot of light.

That’s why you need to secure your plant from the strong afternoon sunlight rays. This may burn the begonia leaves and make them drop.

If they are outdoors, put them in partial shade. If they are indoors, put them where there is bright, indirect light.

East, West, or South facing windows is the best for indoor begonia growing.

In case the leaves appear scorched when placed near the South facing window, then move the plant away from the window.

If your begonia leaves are faded, then this is a sign that they are burning.

And if their stems become weak as they grow towards the side of the window, then this is an indication that they are not receiving enough light.


Being placed in direct sunlight rays where the leaves get burnt. Alternatively, being denied light, which is vital for photosynthesis.

What To Do

Position your begonia plants well, whether indoors or outdoors. Ensure that they receive enough sunlight, but not direct light.

During winter, you can even use grow lights to help them receive enough light for growth.

Bottom Line

Now that you know why your begonia plant is dropping leaves, you should amend the problem right away.

To avoid similar problems in the future, ensure to follow the right practices for planting and caring for your begonia plant.

Make sure your plant is in the right pot size, receives enough humidity, water, sunlight, and fertilizer.

When repotting, ensure that you do so in the spring before plants become active again.

If all these factors are kept right, your plant will grow healthily and without any problem.

Doing these things daily might seem tiresome, but they will help you to have peace of mind knowing that your magnificent begonia plant is healthy and growing strong.

We wish you all the best as you try to revive your begonia plant.