PlantsAgaves→Black-Spined Agave (Agave macroacantha)

Common names:
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General Plant Information (Edit)
Plant Habit: Cactus/Succulent
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Minimum cold hardiness: Zone 9a -6.7 °C (20 °F) to -3.9 °C (25 °F)
Plant Height: 1-2 feet
Plant Spread: 2-5 feet
Leaves: Glaucous
Other: Black terminal spines adorn the tips of each leaf.
Fruit: Dehiscent
Flowers: Showy
Other: Reportedly this agave lives at least 15 years or more before flowering.
Flower Color: Green
Other: Green with a purple tinge.
Bloom Size: 1"-2"
Inflorescence Height: 6-10 feet
Foliage Mound Height: 1-2 feet
Suitable Locations: Xeriscapic
Uses: Will Naturalize
Resistances: Deer Resistant
Rabbit Resistant
Drought tolerant
Propagation: Seeds: Can handle transplanting
Other info: Sow in shallow pots with a well draining, sterile mix; 50/50 organic/inorganic of coarse perlite, pumice; sphagnum peat or good compost. Avoid manures. Irrigate from below. Provide bright, indirect light and a transparent cover to retain moisture.
Propagation: Other methods: Cuttings: Stem
Other: Bulbils.
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots
Miscellaneous: With thorns/spines/prickles/teeth
Awards and Recognitions: RHS AGM
Conservation status: Endangered (EN)

Conservation status:
Conservation status: Endangered
Huntington Gardens

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Posted by Baja_Costero (Baja California - Zone 11b) on Mar 24, 2020 5:21 PM

Small glaucous blue, blue-gray, or blue-green agave from southern Mexico which offsets via short rhizomes and clumps over time. Leaves are well armed, with sharp teeth and a stout terminal spine. The teeth may emerge reddish but they turn black as they age. Rosettes grow to about 10-16 inches wide. Inflorescences may grow to 6-10 feet tall, with short branches. Found in Puebla and Oaxaca. A member of the Rigidae.

This is a practical, drought-tolerant, sun-loving agave in cultivation. It does best in containers when offsets are removed every year or two. Bluer plants may be susceptible to rot if given too much water or too little drainage. Greener plants are said to tolerate more water. This agave does better with some overhead protection in hot desert climates.

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Posted by sheryl (Hot, hot, hot, Feenix, AZ - Zone 9b) on Nov 7, 2013 10:15 AM

This is a beautiful plant that varies from silver to bit more blue.with small black teeth edging part way down the leaf and a black terminal spine. They tend to clump freely and form nice, rounded mounds.

This species needs some shade in the low desert's intense sun, but almost no supplemental water - a once a month soaking in the hottest parts of Phoenix summer is sufficient.

There is some evidence that this plant is resistant to the Agave Snout Weevil, Scyphophorus acupunctatus.

Propagation is primarily through pups.

One of my absolute favorite Agaves, in case you couldn't tell. 8*)

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Discussion Threads about this plant
Thread Title Last Reply Replies
Show off your Agave pictures here. by Stush2019 Feb 26, 2021 3:42 PM 531
Cactus and succulents chat by Baja_Costero Mar 3, 2021 8:47 PM 9,483
Same? by jmorth Mar 9, 2017 9:53 PM 2
Cactus and Succulent chat 2016 by gg5 Apr 11, 2017 11:52 AM 1,827
Desert Botanical Garden, Phoenix, Arizona, November 17, 2015 by csandt Jan 18, 2016 10:37 PM 2

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