Gasteria carinata var. verrucosa

RHS Plant Profile

warty keeled ox tongue

Synonyms

Gasteria verrucosa

Cactus Succulent

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A clump-forming succulent to 15cm tall, with two ranks of tough, keeled leaves, heavily speckled with raised, white tubercles. In late spring and summer, slender spikes to 30cm high bear pendulous, tubular, orange flowers with green tips

Position

Full sun, Partial shade

Soil Types

Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0-0.1 metre

Size

Time to Maturity: 2–5 years
Max Spread: 0-0.1 metre
Max Height: 0.1-0.5 metres

Growing Conditions

Loam Sand

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

Position

Full sun Partial shade

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): H1C

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asphodelaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Clump forming
Genus: Gasteria are stemless, succulent perennials forming clumps of rosettes of fleshy leaves, often 2-ranked, and racemes of pendulous, tubular flowers
Name Status: Correct
Plant Range: South Africa (Western Cape, Eastern Cape)

How to Grow

Cultivation

Under glass, grow in standard cactus compost in bright, filtered light. During growth water moderately and apply a low-nitrogen liquid fertiliser every 4 or 5 weeks; keep almost dry in winter

Propagation

Propagate by seed, separating offsets or leaf cuttings

Suggested planting locations and garden types

Houseplants
Low Maintenance
Conservatory and greenhouse

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free