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Cactus SucculentConservatory Greenhouse

Astrophytum capricorne

goat's horn cactus

A spherical to ovoid cactus 20-25cm in height and 10cm in diameter, with 7-9 ribs which are light-green with white flecks. Long, twisted spines are yellowish-brown in colour. Yellow flowers 6-10cm are produced in summer

Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
10–20 years
Ultimate spread
0–0.1 metre
Growing conditions
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green White
Summer Green White Yellow
Autumn Green White
Winter Green White
Position
  • Full sun
Aspect

West–facing or South–facing

Exposure
Sheltered
Hardiness
H2
Botanical details
Family
Cactaceae
Native to GB / Ireland
No
Foliage
Evergreen
Habit
Columnar upright
Genus

Astrophytum are compact perennial cacti with ribbed, spherical or columnar stems bearing woolly, sometimes also shortly spiny areoles, and large, solitary, funnel-shaped flowers in summer, followed by red or green berries

Name status

Correct

Plant range
NE Mexico

How to grow

Cultivation

Under glass grow in a sharply-draining, peat-free, loam-based compost with extra sharp sand, or a proprietary cactus compost, in bright filtered light. Water thoroughly once the compost has become dry in the growing season from spring to early-autumn, but keep dry when dormant. In warmer climates outdoors grow in sharply drained, poor, slightly alkaline soil in full sun

Propagation

Propagate by seed sown at 21°C in early spring

Suggested planting locations and garden types
  • Patio and container plants
  • Sub-tropical
Pruning

No pruning required

Pests

May be susceptible to scale insects and mealybugs under glass

Diseases

Generally disease-free

Get involved

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