Crassula muscosa is an interesting succulent that grows up to 12 inches (30 cm) tall with a spreading habit of branching stems having tightly, overlapping, stacked, narrow, light green leaves. The leaves completely hide the stems, which start erect but then trail over from the weight of all of the leaves. The small, pale yellowish-green, musty-smelling flowers appear along with the leaves tight along the stems in spring to mid-summer. It is a great plant for adding a unique texture to a mixed planting or small scale ground cover in a well-drained mound or rock garden.
The most common of the common names for this plant is Watch Chain for its delicate interlocking leaves that are much like the tight jewelers' links used to attach a pocket watch to the vest. It is also called Princess Pine, Clubmoss Crassula, Zipper Plant, and Rattail Crassula. The specific epithet "muscosa" is Latin for "mossy" in reference to this plant's moss-like looks. It has also been called Crassula lycopodioides which is in reference to the plant being like Lycopodium, a genus of clubmoss.
Watch Chain comes from diverse habitats and is widespread in South Africa from the winter rainfall area of the Western Cape to the summer rainfall areas of the Eastern Cape and north into Namibia and Lesotho, though often growing only in well-drained rocky quartz fields. It is hardy to around 20 °F (−6.7 °C) but seems to resent being cold and wet at the same time.
Growing Conditions and General Care
Plant in well-drained soil in full sun to light shade or indoors. If planting indoors, place it in a room that gets a lot of sunlight. The best color maintained with a bit of shade even on the coast.
Watch Chain has typical watering needs for a succulent. It is best to use the "soak and dry" method and allow the soil to dry out completely between waterings.
Since Watch Chain is not cold-hardy, it should be brought indoors when the temperature falls below 20°F (-6.7°C).
During the growing season, the plants should be feed with a controlled-release fertilizer. It can be feed weekly with a weak liquid solution.
While in summer it needs a lot more water and it should not be exposed to full sun, as it only values brightness but would suffer under excessive sunlight. When these conditions are not met, the plant begins to dry and stiffen, generally starting from the base of the stem up to the tips.
Watch Chain should be repotted during the warm season. It should be made sure that the soil is dry while repotting the plant. Any old soil must be shaken off the roots before planting the plant in a new pot. Any dry or damaged roots should also be discarded in the process.
Watch Chain is an invasive species and easily propagated from stem cuttings. If the environment maintains a stable temperature of 68 to 70 °F (20 to 21 °C), the cutting will, therefore, root and grow rapidly with adequate humidity and brightness.
Pests and Diseases
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