Begonia Arabian Sunset

Quick facts

Identity

Also known as

Mallet Begonia; Black Angel Begonia

Synonyms

Begonia 'Black Angel'

Environment

Terrestrial

Native to

Captive-bred variety

Habitat

Hybrid of horticultural origin; growth habit derived from rainforest understory cane begonias adapted to shaded, humid conditions

Sourcing

Captive-bred

Conservation

Not Evaluated

Care

Care level

Easy

Growth form

Upright

Max height

6 – 15 in (15 – 38 cm)

Spread

12 in (30 cm)

Growth rate

Slow

Placement

Background

Water

Temperature

65 – 82 °F (18 – 28 °C)

Humidity

50 – 90%

Planting

Substrate

Nutrient-rich preferred

Feeds from

Roots

Fertilizer needs

Medium

Colors

Green, Red, Brown, Pink

Feeding & breeding

Propagation

Cuttings

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Care guide

Overview

Teardrop leaves with a ruffled edge show maroon and red tones against dark green, offset by bright pink flowers along bamboo-like, swollen-noded stems. This cane-type begonia works as a background terrarium or paludarium accent or as a houseplant, growing slowly under bright indirect light with humidity above 70%. Soil must dry between waterings, and it should never be submerged or misted directly.

Care

This cane-type begonia forms upright, bamboo-like stems with swollen nodes and does well as a terrarium accent or houseplant given bright, indirect light and steady warmth above 65F. It tolerates a wide humidity range but colors up best and grows most densely above 70% relative humidity, as found in a closed terrarium or paludarium riparium zone. Keep it out of direct sun and avoid wetting the foliage, since damp leaves invite fungal problems.

Planting & trimming

Pot in a loose, airy, well-draining mix such as a blend of orchid bark, perlite, and standard potting soil, keeping the crown above the substrate line to prevent stem rot. In terrariums or paludariums, place it in a background area above the waterline with good airflow around the foliage, never allowing the roots or stems to sit in standing water. Trim leggy stems back to encourage bushier growth and to harvest cuttings for propagation.

Fertilizing

A balanced diluted liquid fertilizer applied every few weeks during active growth supports foliage color and stem development, since this begonia is grown in soil rather than aquatic substrate. Reduce or stop feeding in low light or cooler months when growth slows. Pale new leaves or weak stem growth usually indicate the plant needs a nutrient boost rather than more water.

Propagation

Propagates readily from stem cuttings taken with two to four nodes, rooted in water or directly in moist substrate. Leaf cuttings can also be used, though stem cuttings root faster and more reliably for this cane type. New plants typically show root development within a few weeks under warm, humid conditions.

Problems

Overwatering is the most common cause of decline, leading to soft, rotting stems and root loss, so the growing medium should be allowed to dry slightly between waterings. Crisping or browning leaf edges typically point to humidity that is too low or exposure to direct light, while limp leaves and stem collapse can indicate rot from excess moisture around the base. Sucking insects such as mealybugs and aphids occasionally show up on new growth and should be treated promptly to prevent spread.

Sources

1. Begonia 'Arabian Sunset' (Mallet Begonia) – Nature Aquariums USA
2. Begonia 'Arabian Sunset' – NParks FloraFaunaWeb
3. Begonia 'Arabian Sunset' – Jungle Leaves
4. PlantFiles: Begonia, Mallet Begonia 'Arabian Sunset' – Dave's Garden

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