Black-thorn aloe (Aloe melanacantha)

Black-thorn aloe

Black-thorn aloe is a succulent plant that is native to Madagascar. It is a hardy and low-maintenance plant that can survive in various climates, from hot and dry to cooler temperatures. It has black spines, which are found along the edges of its leaves. These spines help protect the plant from predators, as well as from excessive sun exposure.

Scientific classification

Species

Black-thorn aloe (Aloe melanacantha)

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Perennial

Lifespan

Brown, Green

Leaf Color

Gray

Fruit Color

Yellow, Red, Green

Flower Color

Evergreen

Leaf type

20 - 41 ℃

Ideal Temperature

Images of Black-thorn aloe

Distribution of Black-thorn aloe

Distribution Map

Black-thorn aloe is indigenous to southern parts of the African continent. It flourishes in its natural habitat there, thriving in arid regions. Beyond its native range, black-thorn aloe has been introduced and is cultivated in various locales around the world. This success in cultivation underscores its adaptability to different climates and environments beyond its origin.

Native

Cultivated

Invasive

Introduced

No species reported

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Quickly Identify Black-thorn aloe

Compact rosettes around 1 foot (30 cm) tall and wide

Narrow, triangular leaves measuring 6-8 inches (15-20 cm) with reddish hue

Upward-curved leaves with single row of yellow-to-black spines

Winter spike up to 3 feet (90 cm) tall with red-orange to yellow flowers

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Care Guide for Black-thorn aloe

Every 3 weeks

Water

Full sun

Sunlight

20 - 41 ℃

Ideal Temperature

Water: Black-thorn aloe thrives in dry, well-draining soils and requires filtered water, as it is sensitive to mineral content. Water deeply but infrequently, checking soil moisture 2-3 inches down. If too moist, dry the plant before replanting in fresh soil and avoid watering for a week.

Fertilize: Black-thorn aloe thrives without fertilizer but may benefit from a phosphorus-rich fertilizer once annually in spring to enhance growth. An alternative is a 1 in (2.5 cm) thick layer of worm castings applied in mid-spring. Avoid fertilizing in cold seasons to prevent growth issues.

Pruning: Black-thorn aloe has stiff, spined leaves and black thorns. Prune in early spring to remove dead leaves and prevent fungal issues, using sanitized tools for clean cuts. Avoid over-pruning to maintain natural form; regular pruning enhances airflow and sunlight, promoting overall health and vigor.

Propagation: To cultivate black-thorn aloe, use well-draining soil and moderate watering. Propagate with fresh seeds in gritty substrate, providing ample sunlight but shielding from intense midday rays. Avoid waterlogged conditions, and handle seedlings gently to ensure healthy growth into robust specimens.

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