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Rex Begonia Plant Care: Tips for Healthy Foliage

Pubblicato il November 20, 2025

Rex Begonia Plant Care: Tips for Healthy Foliage

Origin

Rex Begonias are tropical plants with beautiful foliage. As such, unlike other begonias, these are typically grown for their leaves rather than flowers.

There is some record of fibrous begonias in Brazil being documented as early as the late 1600s, however, Rex Begonias in particular were first discovered in 1856, where they were found growing in the bases of orchid shipments to England. They've since also been found in other parts of South America as well as in Eastern Asia.

'Begonia' is named after the 17th Century French botany enthusiast Michel Bégon, andRexis the Latin for 'king'. So it could be said that this variety is the king of begonias!

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Care

In comparison to other tropical plants, Rex Begonias are thankfully a bit easier to care for. The trickiest thing is perhaps finding the perfect balance between just enough water and not too much. However, once you've figured this out it's quite simple to keep your plant happy.

They like warm, humid conditions, so it may be necessary to boost the humidity around your Rex Begonia, for example, by using a pebble tray. They'll often do well in a bathroom setting, provided they get enough light. However, as much as they enjoy moisture, be sure not to let their soil get too wet - this plant can be sensitive to overwatering.

Never water directly onto the leaves and avoid splashing it with cold water as well.

Rex Begonias can be prone to developing powdery mildew, a type of fungus that can spread to your other plants if left untreated. This is why it's particularly important not to let the leaves get wet and to ensure that there is good air circulation around your plant.

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Other

There are actually over 2,000 different species of begonia! They can vary quite greatly in appearance, with a variety of foliage and flower types.

Unfortunately, Rex Begonias are toxic to animals, so they're not a pet-friendly houseplant choice. Make sure to keep them well out of reach of cats and dogs.

They can reach a height of up to 1.5 feet (45 cm) with a similar spread, forming a shrub-like appearance.

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Domande frequenti

What does the name 'Rex Begonia' mean?

The name 'Begonia' honors French botanist Michel Bégon. 'Rex' is Latin for 'king', suggesting this variety is considered the king of begonias due to its striking appearance.

What kind of environment do Rex Begonias prefer?

Rex Begonias thrive in warm, humid conditions. You can increase humidity around your plant with a pebble tray or by placing it in a well-lit bathroom.

How should I water my Rex Begonia to keep it healthy?

The key is to find a balance, as they are sensitive to overwatering. Never water directly onto the leaves and avoid splashing them with cold water.

How can I protect my Rex Begonia from powdery mildew?

To prevent powdery mildew, a fungus they can be prone to, ensure good air circulation around your plant. It is also very important to keep their leaves dry.

Are Rex Begonias safe to have around pets?

No, Rex Begonias are toxic to animals. It is best to keep them well out of reach of cats and dogs to ensure your pets' safety.