Crassula rupestris subsp. marnieriana

RHS Plant Profile

worm plant

Synonyms

Crassula marnieriana

Cactus Succulent Houseplants

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A perennial succulent, with pairs of fleshy, rounded grey-green leaves that are fused at the base, wrapping the stem so densely that it usually can't be seen. Leaves sometimes take on a reddish tint. Clusters of tiny white flowers are produced at the tips of the stems in spring, though these are rarely seen in cultivation

Position

Full sun

Soil Types

Loam

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 0.1-0.5 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Loam

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H2

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Crassulaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Columnar upright
Genus: Crassula can be succulent annuals, perennials, evergreen shrubs or sub-shrubs, with fleshy leaves and small, star-shaped or funnel-shaped flowers in a terminal cluster
Name Status: Correct
Plant Range: South Africa (Cape)

How to Grow

Cultivation

Grow indoors in standard cactus compost in full light. From spring to autumn, water moderately, avoiding wetting the leaves, and apply a balanced liquid fertiliser monthly. Water sparingly in winter. See houseplant cacti and succulent cultivation for further information

Propagation

Propagate by softwood or leaf cuttings in spring or summer

Suggested planting locations and garden types

Houseplants
Conservatory and greenhouse

Pruning

No pruning required

Pests

May be susceptible to aphids, mealybugs and vine weevil

Diseases

Generally disease-free