Alphabetical Plant Listing

Pachycereus marginatus (Mexican Fence Post Cactus)

Central Mexico Organ Pipe, Mexican Fence Post Cactus, Organ Cactus, Cereus marginatus, Lemaireocereus marginatus, Lophocereus marginatus, Marginatocereus marginatus, Stenocereus marginatus


Stiff and imposing, Pachycereus marginatus (Mexican Fence Post Cactus) is a handsome columnar cactus that develops unbranched stems from the base when mature. The exceptionally straight, upright, dark green stems can reach 15 ft. or more (450 cm) in cultivation. Each rough stem possesses 5-7 ribs, which are lined with spines, mature specimens bearing shorter spines than juvenile specimens. During the spring, pink to green flowers develop from the areoles. They are followed by edible, spiny red fruits. The fruits can be used to make jams and jellies as well. The way Mexican Fence Post seeds itself is by droppings, the fruits ripen and fall to the floor starting a cycle for new plants to grow. Native to Central Mexico, the Mexican Fence Post is most commonly used today for landscaping and is valued as an accent, specimen, or character plant in arid, tropical landscapes. It is also useful to build an effective windbreak barrier. Prized for its low maintenance and low water needs, it is easy to grow. Known for its durability in the heat, it is reported to be cold-hardy down to 24°F (-4°C) for short periods.

  • Grows up to 10-15 ft. tall (300-450 cm) and 6-10 ft. wide (180-300 cm).
  • Easily grown in fertile, well-drained soils in full sun. Water regularly in summer but allow to dry fully before watering again. Drought tolerant.
  • Great for desert gardens, rock gardens, succulent gardens or hedges, or living fences.
  • Virtually pest and disease free. Susceptible to fungal diseases if over-watered. Deer resistant.
  • Propagate by seed or stem cuttings. The seeds are quite easy to germinate and grow as long as they are provided with high humidity levels, free-draining soil mix, and enough water, light, and nutrition..
  • Native to Central Mexico.

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Requirements

Hardiness 9 – 11
Plant Type Cactus - Succulents, Trees
Exposure Full Sun
Season of Interest Spring (Early,Mid,Late)
Summer (Early,Mid,Late)
Fall
Winter
Height 10' – 15' (3m – 4.5m)
Spread 6' – 10' (180cm – 3m)
Water Needs Low
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy, Evergreen, Fruit & Berries
Tolerance Deer, Drought, Rabbit, Dry Soil, Rocky Soil
Attracts Birds
Garden Uses Beds and Borders, Hedges and Screens
Garden Styles Gravel and Rock Garden

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c) Gerhard Bock, SucculentsandMore.com, Armante Darmanin, Flickr

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 9 – 11
Plant Type Cactus - Succulents, Trees
Exposure Full Sun
Season of Interest Spring (Early,Mid,Late)
Summer (Early,Mid,Late)
Fall
Winter
Height 10' – 15' (3m – 4.5m)
Spread 6' – 10' (180cm – 3m)
Water Needs Low
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy, Evergreen, Fruit & Berries
Tolerance Deer, Drought, Rabbit, Dry Soil, Rocky Soil
Attracts Birds
Garden Uses Beds and Borders, Hedges and Screens
Garden Styles Gravel and Rock Garden

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