Begonia rex 'Black Mambo' ('Dark Mambo') – Care Guide & Information
Begonia rex 'Black Mambo' is a stunning houseplant known for its deep black, velvety leaves, striking red undersides, and elegant spiral structure. With cream-colored stems and a compact growth habit, it adds a dramatic, exotic touch to any indoor space.
Key Features

Velvety Black Leaves: Deep black foliage with vibrant red undersides.
Spiral Leaf Formation: Adds texture and visual intrigue.
Compact Size: Ideal for small living spaces or desktops.
Cream-Colored Stems: Elegant contrast to dark foliage.

Care Guide

Light: Prefers bright, indirect light. Avoid direct sun.
Watering: Water when the top 2–3 cm of soil feels dry. Ensure proper drainage.
Humidity: Requires 60-70% humidity. Use a humidifier or place near other plants.
Soil: Well-draining mix of peat, perlite, and organic material.
Fertilizing: Feed every 4-6 weeks with a balanced liquid fertilizer.
Temperature: Maintain 18-24°C. Avoid cold drafts.
Repotting: Every 1-2 years in spring. Use a pot with drainage holes.
Propagation: Leaf cuttings in moist peat-perlite mix. Keep in a warm, humid spot.
Hydroponics: Adaptable to semi-hydroponic setups.
Pruning: Remove damaged leaves regularly for a healthy plant.

Placement Tips

Best near an east- or west-facing window.
To increase humidity, place on a pebble tray with water or group with other plants.
Rotate periodically for even light exposure.

Toxicity
Begonia rex 'Black Mambo' is mildly toxic to pets and humans if ingested due to calcium oxalates. Keep out of reach of children and pets.
Common Issues & Solutions

Yellow Leaves: Overwatering. Let the soil dry before watering.
Brown Leaf Edges: Low humidity. Increase moisture using a humidifier.
Root Rot: Ensure well-draining soil and avoid standing water.
Pests: Treat mealybugs, spider mites, or fungus gnats with neem oil.
Wilting Leaves: Avoid cold drafts and temperature fluctuations.
Leaf Spots: Improve air circulation and avoid spraying leaves.

Extra Care Tips

Use terracotta pots to regulate moisture.
Hydroponic setups require careful monitoring of water levels.
Create a favorable microclimate by grouping with other plants.

Fun Facts
Begonia rex 'Black Mambo' belongs to the Rex Begonia group, known for their striking leaf patterns. Originally from tropical regions, they were popular during the Victorian era and remain a favorite for their bold aesthetics.
Etymology
The genus Begonia honors Michel Bégon, a French plant enthusiast. The species name rex means "king," reflecting its regal appearance.
Frequently Asked Questions

How often should I fertilize? Every 4-6 weeks with balanced liquid fertilizer.
Can it grow hydroponically? Yes, it thrives in hydroponic systems with controlled water levels.
How to prevent leaf spots? Ensure good air circulation and avoid spraying leaves.
When should I repot? Every 1-2 years, ideally in spring.

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