Cleistocactus Species

Cleistocactusicosagonus

Family
Cactaceae (kak-TAY-see-ee)
Genus
Cleistocactus (Kly-stoh-KAK-tus)
Synonym
Seticereus icosagonus
Cactus icosagonus
Cereus icosagonus
Borzicactus icosagonus
Binghamia icosagona
Sun Exposure
Full Sun
Height
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
Spacing
9-12 in. (22-30 cm)
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
Hardiness
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)
Danger
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Rose/Mauve
Bloom Time
Mid Spring
Late Spring/Early Summer
Other Details
Category
Cactus and Succulents
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
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
Non-patented
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
Regional

This plant is said to grow outdoors in the following regions:

Chandler, Arizona

San Jose, California

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Gardener's Notes:

0
positive
3
neutrals
0
negative
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S
S
| November 2009 | neutral

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 ...Read More

X
Phoenix, AZ (Zone 9b) | November 2005 | neutral

More synonyms of this plant are: Seticereus aurivillus, Cleistocactus humboldtii, Cereus humboldtii, Borzicactus aurivillus, Binghamia hu...Read More

P
Acton, CA (Zone 8b) | March 2004 | neutral

probably a rare species, or has another name... columnar branching cactus with golden spines and coral flowers at top of columns. No inf...Read More

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