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Orostachys iwarenge – Chinese Dunce Cap


Scientific Name

Orostachys iwarenge (Makino) Hara

Common Names

Chinese Dunce Cap, Dunce's Cap


Cotyledon iwarenge (basionym), Orostachys malacophylla var. iwarenge, Sedum iwarenge

Scientific Classification

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


Orostachys iwarenge is a cute, little succulent plant which forms an attractive evergreen groundcover when cultivated in the rock garden. The glaucous, grey/brown, up to 2 inches (5 cm) wide, fleshy rosettes, spread by short stolons to form an up to 1 inch (2.5 cm) tall and 18 inches (45 cm) wide patch. In late summer to early fall, the rosettes are topped with up to 4 inches (10 cm) tall towers jammed with tiny creamy flowers. Each flowering rosette dies away but is unnoticed among the mass of smaller rosettes.

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How to Grow and Care

As with most similar genera of Crassulaceae, 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. Orostachys grows actively in spring and summer.

In general, this is a good plant to forget about. Leave it in a bright sunny location and water very sparingly. Water in the morning so as to prevent water from remaining on the leaves during the night. Remove any dead leaves from rosettes, as dead leaves invite rot and insects. When a rosette has flowered, it will die shortly… – See more at: How to Grow and Care for Orostachys.


Native to Japan.


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