Prometheum chrysanthum (Boiss.) 't Hart
Chaloupkaea chrysantha, Cotyledon chrysantha, Prometheum chrysanthum subsp. chrysanthum, Rosularia chrysantha, Sedum chrysanthum, Umbilicus chrysanthus
Prometheum chrysanthum, formerly known as Rosularia chrysantha, is a slow-growing succulent that forms small rosettes of fleshy, spoon-shaped, fresh green leaves with light velvety coating. The rosettes grow up to 1.2 inches (3 cm) in diameter, producing offsets to form a dense mound.
Clusters of ivory or pale yellow flowers with reddish venation on the petals are produced on upright stems in early summer. The flowers are bell-shaped to narrowly funnel-shaped and up to 0.6 inches (1.5 cm) long. The rosettes die after flowering.
Prometheum chrysanthum is native to southwestern and southern Turkey.
USDA hardiness zone 5a to 9b: from −20 °F (−28.9 °C) to 30 °F (−1.1 °C).
How to Grow and Care
Whether grown outdoors or in, these plants are good to forget about. Too much attention by nervous gardeners will kill the plant. When grown outdoors in a wet environment, make sure that the soil is sandy and well-draining. If you aren't careful, your plant will turn into rotten mush. Mix native soil with sand, if necessary. When grown indoors, a standard commercial cactus and succulent soil mix work well. In the event of an unhealthy plant, the first thing to examine is your watering habits.
The most common problem is root rot due to overwatering. If the soil is too wet, don't hope it will safely dry out so long as you don't water it for a while. This plant is best grown outdoors, and if you live in an area where winter's temperatures rarely go below -10°F (-23°C), this is the best for Rosularia.
When potted, these plants are very susceptible to vine weevil. The plant is often used as a bedding or groundcover plant.
See more at How to Grow and Care for Rosularia.
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