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PlantFiles: Cleistocactus
Cleistocactus icosagonus

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Cleistocactus (Kly-stoh-KAK-tus) (Info)
Species: icosagonus

Synonym:Seticereus icosagonus
Synonym:Cactus icosagonus
Synonym:Cereus icosagonus
Synonym:Borzicactus icosagonus
Synonym:Binghamia icosagona

One member has or wants this plant for trade.

Cactus and Succulents

6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)

9-12 in. (22-30 cm)
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)

USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Full Sun

Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:

Bloom Time:
Mid Spring
Late Spring/Early Summer

Unknown - Tell us

Other details:
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
From woody stem cuttings
Allow cut surface to callous over before planting
From seed; direct sow after last frost

Seed Collecting:
Bag seedheads to capture ripening seed
Allow unblemished fruit to ripen; clean and dry seeds
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds
Properly cleaned, seed can be successfully stored

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By Stake
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No positives
3 neutrals
No negatives

Gardeners' Notes:

Neutral Stake On Nov 8, 2009, Stake from Barmera
Australia wrote:

I believe the species name is spelled wrongly. In both Anderson and TNCL it is C. icosagonus and I can find no species with the spelling C. igosagonus.

Neutral Xenomorf On Nov 29, 2005, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

More synonyms of this plant are: Seticereus aurivillus, Cleistocactus humboldtii, Cereus humboldtii, Borzicactus aurivillus, Binghamia humboldtii, Cereus aurivillus, Matucana humboldtii, Seticereus humboldtii, Cactus humboldtii & Borzicactus humboldtii.

Neutral palmbob On Mar 23, 2004, palmbob from Acton, CA (Zone 8b) wrote:

probably a rare species, or has another name... columnar branching cactus with golden spines and coral flowers at top of columns. No information on height or hardiness, though does well in zone 10a


This plant has been said to grow in the following regions:

Chandler, Arizona
San Jose, California

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