Not the plant you're looking for? Search over 300,000 plants
Cactus Succulent

Pachycereus marginatus

organ pipe cactus

A large, upright cactus, reaching up to 15m in its native range but usually much smaller in cultivation. Stems are deep green, with 5-7 ribs edged with slightly woolly areoles that are often linked together creating a pale-coloured line down the rib. Areoles bear short spines, and on mature plants produce nocturnal white, pink or purple flowers in spring, followed by round reddish fruits. Young plants are often single-stemmed, only branching at the base as they mature

Synonyms
Cereus marginatus
Lophocereus marginatus
see moreMarginatocereus marginatus
Stenocereus marginatus
Buy this plant
Size
Ultimate height
Higher than 12 metres
Time to ultimate height
20–50 years
Ultimate spread
2.5–4 metres
Growing conditions
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green White Pink Purple
Summer Green Red
Autumn Green
Winter Green
Position
  • Full sun
Aspect

South–facing

Exposure
Sheltered
Hardiness
H1B
Botanical details
Family
Cactaceae
Native to the UK
No
Foliage
Evergreen
Habit
Columnar upright
Genus

Pachycereus are a genus of columnar, tree-like perennial cacti, native to semi-desert areas of the USA and Mexico. Branches form from the bases of the main stems and have large spines with tubular flowers produced only on mature plants in the summer.

Name status

Correct

Plant range
Mexico

How to grow

Cultivation

Grow under glass, or in patio containers and overwinter in a greenhouse. Plant in a sharply-draining cactus mix and position in full sun. Water moderately when in growth, keep dry over winter. See houseplant cacti and succulent cultivation for more advice

Propagation

Propagate by seed, sown at 19-24ºC in spring, or by stem tip cuttings in summer

Suggested planting locations and garden types
  • Architectural
  • Houseplants
  • Patio and container plants
  • Conservatory and greenhouse
Pruning

No pruning required

Pests

Maybe susceptible to scale insects and sometimes mealybugs

Diseases

Generally disease-free

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.