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.
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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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