Crassula marnieriana
Crassula marnieriana (Worm Plant) Care Guide
Featured photocrassula-marnieriana.jpgCrassula marnieriana, sold as Worm Plant, is a member of *Crassula*, a southern African succulent genus of around 200 species. A South African branching succulent with stacked rounded leaves on short stems, often called the 'baby's necklace' or 'worm plant' for its segmented look. Leaves blush red along the margins in bright light. Like most Crassula it tolerates long dry spells thanks to its thick fleshy leaves, and propagates readily from stem or leaf cuttings.
Care facts at a glance
- Light
- Full sun
- Water
- Water deeply when the mix is fully dry, then drain completely.
- Humidity
- 20–50 %
- Temperature
- 10–27 °C
- Soil
- Free-draining cactus or succulent mix with extra perlite or pumice.
- Origin
- Mostly southern Africa (Western and Eastern Cape), with a few species across tropical Africa and Madagascar.
- Mature size
- 10 to 60 cm tall depending on species; some cultivars stay compact.
Overview
Crassula marnieriana sits in Crassula, the type genus of Crassulaceae and the family that gives the broader succulent group its name. A South African branching succulent with stacked rounded leaves on short stems, often called the 'baby's necklace' or 'worm plant' for its segmented look. Leaves blush red along the margins in bright light. Most Crassula come from the winter-rainfall western Cape and grow during cool wet months, slowing through hot dry summers — the reverse of the seasonal pattern most northern hemisphere growers expect.
Care Priorities
- Full sun or very bright filtered light keeps stems compact.
- Free-draining mix; sustained moisture rots the roots.
- Water deeply, then let the mix dry fully.
- Many species rest in summer rather than winter — adjust watering accordingly.
Common Problems
Soft, mushy stems are overwatering — almost always fatal once it reaches the base. Wilted leaves on a dry plant recover quickly after a deep watering. Black spots on stems are a fungal sign of stress; cut back to clean tissue and replant.
Sources & further reading (2)
- encyclopedia — accessed 2026-04-29
- botanical-garden — accessed 2026-04-29
Frequently asked questions
Why are the leaves stacked so tightly?
C. marnieriana has very short internodes, so the opposite leaf pairs sit almost on top of each other along the stem. The result is the species' characteristic segmented look — natural, not stress-related.
Why is my Crassula losing leaves at the base?
Lower-leaf drop is normal in mature Crassula and accelerates during the natural rest period. As long as the upper rosette stays firm, the bare stem is structural rather than sick — many species develop attractive woody trunks over time.
Can I prune Crassula to keep it bushy?
Yes — Crassula tolerates pruning well. Cut back leggy stems just above a leaf node and root the cuttings in dry succulent mix. The parent plant typically pushes multiple new shoots from below the cut.
