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Complete guide to ‘Iron Cross’ begonia care

Unusual leaves with a ruffled texture, this begonia stands out from the crowd.

Close-up detail photo of an 'Iron Cross' begonia leaf on a white studio background

Begonias are a popular choice for indoor plants, and Mason the masoniana begonia is a stunning addition to any collection. This plant is also known as the Iron Cross Begonia due to the unique cross-shaped pattern on its leaves. However, caring for a masoniana begonia can be a bit tricky, so it's important to understand its specific needs. Let’s go:

  • This plant only needs watering when the top two inches of soil feel dry. Don’t be tempted to overwater it.
  • You’ll get the most vivid colouring on the leaves if you put it somewhere with lots of light, but not harsh direct sun.
  • It’s happiest if the atmosphere is moist. A bright bathroom would be a great home for this begonia.

About ‘Iron Cross’ begonias

The name Iron cross begonia comes from the rust-coloured patterning on this little plant’s leaves. It’s most typically found in forests in China, where it will grow up to about 50cm tall.

Begonias have become popular across the world, both as indoor and outdoor plants (the dramatically flowering ones are a British garden staple). Iron cross may flower, with tiny white blooms, but the real attraction here is the vividly patterned leaves.

An 'Iron Cross' begonia in a cream dipped decorative pot on a side table in a living room

How much light does my ‘Iron Cross’ begonia need?

Masoniana begonias prefer bright, indirect light. They should be placed near a window that receives filtered light, but not direct sunlight. Direct sunlight can scorch the leaves and cause damage. If your plant is not receiving enough light, it may become leggy and stretched out. On the other hand, too much light can cause the leaves to wilt and dry out.

How often should I water my ‘Iron Cross’ begonia?

Begonias like to be kept evenly moist, but they don't like to sit in water. Overwatering can lead to root rot and damage to the plant. Water your masoniana begonia when the top two inches of soil feel dry to the touch. Water it thoroughly, allowing the excess water to drain away completely. A few hours later, check the decorative pot and throw away any water that’s collected.

What type of soil does my ‘Iron Cross’ begonia need?

Masoniana begonias prefer well-draining soil that’s rich in organic matter. When repotting your ‘Iron Cross’ begonia, you can use a standard houseplant potting mix that contains perlite to improve drainage. Avoid using heavy soil that doesn't allow water to drain properly, as this can cause root rot. It's also a good idea to repot your plant every year or two to refresh the soil and promote healthy growth.

Does my ‘Iron Cross’ begonia need a humid environment?

Masoniana begonias grow in humid conditions, so they prefer high humidity levels. You can increase the humidity around your plant by misting it regularly or placing a tray of water nearby. You can also consider using a humidifier to create a more humid environment. Dry air can cause the leaves to dry out and turn brown.

What’s the best temperature for my ‘Iron Cross’ begonia?

Masoniana begonias prefer warm temperatures, ideally between 18-25°C. They don’t enjoy temperatures below 12°C, so make sure to keep your plant away from draughts and cold windows, especially in winter.

Should I fertilise my ‘Iron Cross’ begonia?

Your masoniana begonia will benefit from regular fertilisation during the growing season. You can use a balanced liquid fertiliser every two to four weeks, diluted to half the recommended strength. Over-fertilising can burn the plant's roots, so it's important to follow the instructions carefully. During the winter months, when the plant is not actively growing, you can stop fertilisation altogether.

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