Black-spined agave (Agave macroacantha)

Black-spined agave

A slow-growing evergreen succulent, the black-spined agave can take 15 years or more to bloom. Its common name, Black-spined agave, comes from the needle-shaped spines on the leaf tips of this plant. This succulent can be toxic to humans and animals. It is commonly used as an accent plant in garden borders and decorative jars.

Scientific classification

Species

Black-spined agave (Agave macroacantha)

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Perennial

Lifespan

Succulent

Plant Type

Summer

Bloom Time

1 m

Plant Height

1.5 m

Spread

Green, Blue

Stem Color

Evergreen

Leaf type

20 - 35 ℃

Ideal Temperature

Images of Black-spined agave

Distribution of Black-spined agave

Distribution Map

Black-spined agave is native to North America, flourishing predominantly in arid and semi-arid regions. It has been introduced and cultivated in other parts of the world, thriving in areas with a climate that mirrors its native habitat. The plant’s adaptability to dry climates has made it a popular choice for cultivation in similar environments across various continents.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Large pot, garden

Hemisphere Trend Curve

Northern

Sorthern

Quickly Identify Black-spined agave

Compact clumps reaching 2 feet tall and 5 feet wide.

Narrow blue-gray leaves with dark brown marginal teeth and a 1-inch long terminal spine.

Rosettes with leaves measuring 10 to 16 inches wide in radial pattern.

Reddish tint on leaves before blooming, revealing dark red stem.

Flowering process after at least 15 years, with inflorescence on a 6 1/2 feet tall stalk.

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Care Guide for Black-spined agave

Every 3 weeks

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Succulent & Cactus Soil

Soil Type

Water: Black-spined agave thrives in arid environments, demonstrating high drought tolerance. It requires watering once every three weeks and stores water in thick, fleshy leaves. As an outdoor plant in hot climates, it adapted to survive on occasional downpours during sparse rainy seasons.

Fertilize: For black-spined agave, use a balanced, low-nitrogen fertilizer every quarter during the growing season, diluted to half-strength (1/4 tablespoon per gallon). Avoid winter fertilization and ensure even application around the base. Wear gloves due to sharp spines, and consider seasonal nutrient needs.

Pruning: As black-spined agave develops new leaves, the older ones will yellow and dry out; promptly removing them maintains its appearance. Additionally, trim any infected leaves to avoid spreading pests and diseases to healthy foliage.

Propagation: Black-spined agave features thick leaves with sharp black spines and thrives in well-drained soil under full sun or partial shade. Propagate by carefully separating offsets, ensuring sufficient roots, and providing slight moisture while minimizing handling to encourage mature growth.

Repotting: Repot black-spined agave every two years in spring to support growth. Use a larger clay or terracotta pot with good drainage. After repotting, provide bright light and minimal water until new growth appears, indicating successful adaptation.

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