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Orostachys fimbriata (Dunce's Caps)

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Scientific Name

Orostachys fimbriata (Turcz.) A.Berger

Common Names

Dunce's Cap

Synonyms

Cotyledon fimbriata, Orostachys jiuhuaensis, Orostachys ramosissima, Sedum fimbriatum, Sedum limuloides, Sedum ramosissimum, Umbilicus fimbriatus, Umbilicus ramosissimus

Scientific Classification

Family: Crassulaceae
Subfamily: Sedoideae
Tribe: Sedeae
Subtribe: Umbilicinae
Genus: Orostachys

Description

Orostachys fimbriata is certainly one of the most unique members of the genus Оrostachys. Leaves are brownish-to-orange, covered with a haze of glaucous gray. Soft, fleshy rosettes offset slowly making a small, eye-catching clump. In late summer, the rosettes appear to be erupting like a miniature volcano. The top of the "volcano cone" is actually a flower spike that is adorned with small, star-shaped, white flowers.

Photo via flickriver.com

Hardiness

USDA hardiness zones 5a to 9b: from −20 °F (−28.9 °C) to 30 °F (−1.1 °C).

How to Grow and Care

As with most similar genera of Crassulaceae family, this plant can survive in fairly poor soil, so long as it is well draining. This genera is very cold-hardy and can survive temperatures to -30 °F (-34 °C). Allow soil to dry to the touch between waterings and avoid getting water on the rosettes. Orostachys requires some bright light. This plant doesn't tolerate high humidity well. It grows actively in spring and summer.

Orostachys self-propagates through offshoots and given time one plant will form a dense mat of many. Propagation is primarily through offset separation.

To separate an offset, remove soil from the base of the offset to find the stolon (thick root which attaches the pup to the mother plant). It is best to use an offset which has already established some roots of its own. Cut the stolon close to the pup (to discourage roots growing from the stolon). Place the offset into a small pot with well-draining, sandy soil. Do not water until new growth is noted.

Learn more at How to Grow and Care for Orostachys.

Origin

Orostachys fimbriata is native to Japan.

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