This beautiful blue-gray agave forms tight-growing, symetrical rosettses. The leaves are long and tipped with a black spine. Each leaf has dark brown “teeth” growing along the edges. Although it is monocarpic, it can take 15 years or more to bloom.
Full sun to partial shade
Can be grown indoors if given enough light
Typical water needs for a succulent
Plant grows up to 24″ (61 cm) tall
Plant grows up to 48″ (122 cm) wide
Zone 10a (Minimum 30° F | -1.1° C)
Not cold hardy
Propagation by division and offsets
Can be toxic to humans and animals
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Care and Propagation Information
General Care for Agave macroacantha “Black-spined Agave”
Agave macroacantha “Black-spined Agave” is a great addition to rock gardens or hanging baskets. As it grows, it spreads out as a small shrub. It is native to Madagascar.
“Black-spined Agave” has typical watering needs for a succulent. It’s best to use the “soak and dry” method, and allow the soil to dry out completely between waterings.
Where to Plant
“Black-spined Agave” is not cold hardy, so if you live in a zone that gets colder than 30° F (-1.1° C), it’s best to plant this succulent in a container that can be brought indoors. It does well in full to partial sun.
Plant in an area of your garden that gets 6 hours of sunlight a day. If planting indoors, place in a room that gets a lot of sunlight, such as near a southern-facing window (if you’re in the Northern Hemisphere).
How to Propagate Agave macroacantha “Black-spined Agave”
Agave macroacantha “Black-spined Agave” can be propagated from division or offsets.
To grow “Black-spined Agave” from division, split the rhizome using a sharp knife. Be sure that there are plenty of roots. Allow the succulent to callous over for a day or two before replanting.
Caution: “Black-spined Agave” has toxic sap, as well as sharp spines along the stem. Please use care when handling or propagating this succulent.
To grow “Black-spined Agave” from offsets, use a sterile, sharp knife or pair of scissors. Remove one of the offsets from the main plant, and allow it to callous for several days before planting well-draining soil.
Pairs Well With
Agave macroacantha ‘Pablo’s Choice’
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