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Begonia Black Mamba
Begonia Black Mamba
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Begonia ‘Black Mamba’: A Bold Beauty with a Bite of Drama
How to Grow and Care for This Stunning Foliage Star
If you’re looking for a plant that turns heads and starts conversations, Begonia ‘Black Mamba’ is your answer. With deep, nearly black leaves, a fierce iridescent shimmer, and an edge that screams style, this begonia isn’t just a plant—it’s a statement. Let’s dive into everything you need to know to grow, care for, and fall in love with the bold and mysterious Begonia ‘Black Mamba.’
What Makes ‘Black Mamba’ Special?
This isn’t your average begonia.
‘Black Mamba’ is part of the Rex Begonia family, known for their foliage over flowers. And this one takes it to the next level.
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Color: Deep black to dark burgundy leaves with subtle metallic tones—sometimes with a purple or silver sheen under the right light.
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Shape: The leaves are large, heart-shaped, and heavily textured with a spiraled center that gives it a dynamic look.
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Size: Grows compactly, reaching about 12 inches tall and wide, making it ideal for tabletops or shaded porch planters.
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Drama: It doesn’t just sit quietly. It commands attention. Whether you place it in a collection or let it stand alone, it brings bold energy.
Light: Bright, But Not Direct
Like most Rex begonias, ‘Black Mamba’ loves bright, indirect light. Harsh sun will scorch the leaves. Low light can dull their rich color.
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Indoors: Near an east- or north-facing window works great.
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Outdoors: Only in full shade or dappled morning light. Never full sun.
In other words, treat it like a vampire—too much light, and it suffers. But the right glow? That’s when it truly shines.
Watering: Keep It Moist, Not Wet
Begonia ‘Black Mamba’ likes even moisture, but it hates wet feet. Overwatering is the #1 killer.
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Let the top inch of soil dry out before watering again.
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Always use pots with drainage holes.
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If grown in high humidity, you’ll water less. In dry indoor conditions, you may water a bit more.
If the leaves start to crisp at the edges, you’re probably underwatering. If they turn mushy or drop suddenly, back off on the water.
Humidity: Yes, Please!
This begonia thrives in high humidity—think 50% or higher. Dry air will cause leaf edges to brown or curl.
Here’s how to boost humidity:
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Use a pebble tray with water beneath the pot.
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Run a small humidifier nearby.
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Group it with other plants to create a microclimate.
Bathrooms with windows are excellent locations. So is a bright, humid sunroom.
Soil: Light, Airy, and Well-Drained
Begonia ‘Black Mamba’ needs a light, fast-draining soil mix. The roots are delicate and prone to rot in compact soil.
A great potting mix includes:
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1 part peat or coco coir
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1 part perlite or pumice
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1 part high-quality potting mix
Want a quick shortcut? Look for a mix labeled “African violet mix” or “begonia mix”—it’s usually spot-on.
Feeding: Monthly Meals During the Growing Season
Fertilize once a month in spring and summer with a balanced liquid fertilizer at half strength. That’s enough to keep it lush and happy.
In fall and winter, cut back. The plant naturally slows down, and overfeeding can damage roots during this rest phase.
Pruning and Grooming
Keep it looking sharp by removing:
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Dead or faded leaves
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Damaged stems
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Any signs of mildew or rot
This also helps air circulate and keeps the plant healthy. If it gets too leggy, pinch it back to encourage fuller growth.
Pests and Problems
While ‘Black Mamba’ isn’t high-maintenance, it’s not bulletproof either. Watch out for:
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Spider mites – Love dry air. Use neem oil or insecticidal soap.
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Powdery mildew – Comes with too much humidity and not enough airflow.
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Root rot – The result of overwatering or poor drainage.
Keep an eye on your plant and respond early to any signs of stress.
Propagation: Sharing the Drama
Yes—you can multiply your ‘Black Mamba.’ It’s easier than you think!
Best method? Leaf cuttings or rhizome division.
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Take a healthy leaf with a bit of stem attached.
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Press it into moist, sterile potting mix.
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Cover with a plastic dome or bag to hold in humidity.
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Keep warm and in bright, indirect light.
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In a few weeks, tiny plants will begin to sprout from the base!
It’s a great way to share this gothic beauty with friends or expand your own collection.
Styling Ideas: Show Off That Dark Side
Where do you place a plant this moody and elegant? Anywhere it can shine!
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In a modern pot with gold or white trim to make the leaves pop.
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In a terrarium with other shade lovers like ferns and mosses.
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On a dark wood shelf or in a glass cabinet, where the lighting can spotlight its shimmer.
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Grouped with colorful begonias for contrast—try it with ‘Looking Glass’ or ‘Jim’s Cotton Candy’ for bold color play.
Begonia ‘Black Mamba’ doesn’t fade into the background—it elevates your whole display.
Why You’ll Love Growing It
Let’s face it: there are a lot of pretty plants out there. But few offer the rich, mysterious beauty of this one.
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It’s compact, but makes a big visual impact.
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It thrives indoors and in shady garden corners.
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It adds a rare depth of color with just foliage—no blooms needed.
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It challenges you just enough to feel rewarding.
It’s not the easiest plant out there—but it’s also not a diva if you meet its needs. Once you find that rhythm of light, water, and humidity, you’ll see it thrive.
One Last Thing…
If you’re drawn to plants with personality—plants that stir something inside you—Begonia ‘Black Mamba’ is going to steal your heart. It's bold, it's dark, and it's beautiful in a way few plants dare to be.
So go ahead. Make room for a little drama. You won't regret it.
Would you like me to help you create matching product descriptions for other begonias in your collection?
