PlantsPachycereus→Mexican Fencepost Cactus (Pachycereus marginatus)

Common names:
Give a thumbs up Mexican Fencepost Cactus
Give a thumbs up Fence Post Cactus
Give a thumbs up Chilayo
Give a thumbs up Malinche
Give a thumbs up Central Mexico Pipe Organ
Give a thumbs up Organo

General Plant Information (Edit)
Plant Habit: Tree
Cactus/Succulent
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Dry
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 9b -3.9 °C (25 °F) to -1.1 °C (30 °F)
Plant Height: Up to 20 feet
Plant Spread: Up to 4 feet
Fruit: Showy
Edible to birds
Flowers: Inconspicuous
Flower Color: Pink
Red
Bloom Size: Under 1"
Flower Time: Late winter or early spring
Spring
Suitable Locations: Xeriscapic
Uses: Windbreak or Hedge
Will Naturalize
Edible Parts: Fruit
Resistances: Drought tolerant
Propagation: Other methods: Cuttings: Stem
Cuttings: Tip
Pollinators: Birds
Bees
Wind
Containers: Needs excellent drainage in pots
Miscellaneous: Tolerates poor soil
With thorns/spines/prickles/teeth

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Comments:
Posted by skopjecollection (SE europe(balkans) - Zone 6b) on Nov 28, 2019 12:25 PM

A moderately tall, base-branching cereoid cactus. Features black to gray, short spines, rough green stems, nearly always upward growing. My own and other growers' experiences have found this plant quite susceptible to various pests, including mealybugs, scale and bacteria. Likes mineral soil, full sun, and diligent pest checking. When young it's similar to stenocereus dumortieri, but that one has bright yellow to white spines, and is a lot less problematic.
When older, they grow into lovely architectural cacti, often used to make hedges/fences with cuttings, thus receiving the nickname "fence post cactus."

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Discussion Threads about this plant
Thread Title Last Reply Replies
What is this, is it damaged, and how do I revive it? by Shelbmr Jul 2, 2020 9:21 PM 2
What kind of cactus is this? by 505verde May 12, 2020 10:55 PM 7
Mexican Fence Post? by dflickd Apr 28, 2020 9:51 PM 4
How long can succulents survive in shipping? by Potato01 Feb 12, 2020 4:09 AM 41
Looking for some specific columnar seeds by Crazycactiguy Dec 2, 2018 11:45 AM 9
Which agave is this? by Monetwwqi Oct 28, 2018 11:07 AM 55
2 cacti ID request by skopjecollection Sep 21, 2018 10:54 PM 13
Cactus ID please by tx_flower_child Aug 11, 2018 5:48 PM 2
Mites? by ljones26 Mar 15, 2018 10:18 AM 12
Cactus and succulents chat by Baja_Costero Jan 19, 2021 8:09 PM 9,307

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