Hylotelephium cauticola (Praeger) H. Ohba
Hylotelephium takasui, Sedum cyaneum, Sedum dahuricum, Sedum hyperboreum, Sedum lilacinum, Sedum takasui
Hylotelephium cyaneum, formerly known as Sedum cyaneum, is a mat-forming succulent with short stems and thick, fleshy, smooth grey-green leaves arranged in rosettes. The leaves are up to 0.5 inches (1.3 cm) long, spatula-shaped or lance-shaped, with the pointed end at the base. Flowers are star-shaped, reddish-purple with blackish anthers. They appear in terminal clusters on up to 3.2 inches (8 cm) long, often reddish stems in late summer and early fall.
The specific epithet "cyaneum (sy-AN-ee-um)" is the neuter form of the Latine adjective "cyaneus," meaning "deep or dark blue (color)," and refers to the color of the foliage.
How to Grow and Care for Hylotelephium cyaneum
Light: This succulent prefers full sun. It tolerates light to partial shade in hot summer climates but will produce weak, floppy growth when grown in too much shade. Plant your H. cyaneum in an area of your garden that gets 6 hours of sunlight daily.
Soil: H. cyaneum does not need rich soil, but it does need excellent drainage. Choose a commercial potting mix for succulents, or make one yourself.
Hardiness: This plant has a tolerance to heat and drought and is cold-hardy, making it a popular outdoor succulent. H. cyaneum can withstand temperatures as low as -30 to 30 °F (-34.4 to -1.1 °C), USDA hardiness zones 4a to 9b.
Watering: The best way to water H. cyaneum is to use the "soak and dry" method. Get the soil completely wet, and then wait until it is dry before watering again.
Fertilizing: Feed annually with a balanced fertilizer. According to the package directions, apply the fertilizer to the soil in spring as new growth appears.
Repotting: Plants in containers do require little more care than those in gardens. Repot your H. cyaneum when it outgrows its current pot by moving it out to a larger pot to hold the plant better. Spring is the best time to repot this plant. Make sure the soil is dry before you begin the repotting process.
Propagation: This succulent can be grown from seeds, division, or stem cuttings. Sow seeds in spring. Dividing your H. cyaneum is very easy and can be carried out at almost any time in the growing season, though it is probably best done in spring or early summer. Propagate by stem cuttings in summer.
Learn more at How to Grow and Care for Hylotelephium.
Toxicity of Hylotelephium cyaneum
H. cyaneum can be mildly toxic to humans and animals when ingested.
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