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Cactus Succulent

Opuntia robusta

A shrubby or tree-like cactus, to 2m tall in its native Mexico, with stems composed of thick, flat, rounded, greyish or bluish segments to 40cm across. 2-12 spines arise from each areole. Mature plants produce shallowly bowl-shaped, yellow flowers to 7cm across in summer, followed by spherical, red fruits; but neither flowers nor fruit are likely to be produced in the UK

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
5–10 years
Ultimate spread
0.5–1 metres
Growing conditions
Sand
Moisture
Well–drained
pH
Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green Grey Silver Blue
Summer Green Grey Silver Blue
Autumn Green Grey Silver Blue
Winter Green Grey Silver Blue
Position
  • Full sun
Aspect

South–facing or West–facing

Exposure
Sheltered
Hardiness
H1C
Botanical details
Family
Cactaceae
Native to GB / Ireland
No
Foliage
Evergreen
Habit
Bushy
Potentially harmful
Skin/eye irritant. Wear gloves and other protective equipment when handling Pets (dogs): Skin/eye irritant. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus

Opuntia can be creeping, bushy or tree-like cacti, usually with flattened, pad-like stem segments bearing spines and barbed bristles, and with funnel-shaped flowers followed by spiny, fleshy fruits

Name status

Correct

Plant range
Mexico

How to grow

Cultivation

Under glass, grow in sharply-draining, peat-free, loam-based compost with added sharp sand, or a proprietary peat-free cactus compost. Provide full light at all times and allow compost to dry before watering during growth period in spring, summer and early autumn and apply a balanced liquid fertiliser three or four times. Withhold water and fertiliser in winter when dormant. See houseplant cacti and succulent cultivation for further advice

Propagation

Propagate by seed in spring. Separate and root stem sections. Handle plants using folded newspaper and dispose of it after use

Suggested planting locations and garden types
  • Houseplants
  • Conservatory and greenhouse
Pruning

No pruning required

Pests

May be susceptible to scale insects and mealybugs

Diseases

Generally disease-free

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