Cephalocereus Species, Bunny Cactus, Old Man Cactus, Old Man of Mexico, White Persian Cat Cactus

Cephalocereussenilis

Family
Cactaceae (kak-TAY-see-ee)
Genus
Cephalocereus (sef-uh-low-KER-ee-us)
Species
senilis (SEE-nil-is)
Synonym
Cactus senilis
Sun Exposure
Full Sun
Foliage
Height
8-10 ft. (2.4-3 m)
12-15 ft. (3.6-4.7 m)
15-20 ft. (4.7-6 m)
20-30 ft. (6-9 m)
30-40 ft. (9-12 m)
over 40 ft. (12 m)
Spacing
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 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)
USDA Zone 11: above 4.5 °C (40 °F)
Danger
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Pink
Bright Yellow
White/Near White
Bloom Time
Late Spring/Early Summer
Mid 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; sow indoors before last frost
Seed Collecting
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:

Casa Grande, Arizona

Chandler, Arizona

Green Valley, Arizona

Phoenix, Arizona

Tucson, Arizona(2 reports)

Sparkman, Arkansas

Castro Valley, California

Hayward, California

Oak View, California

San Diego, California(3 reports)

San Marino, California

Santee, California

Thousand Oaks, California

Vacaville, California

Tampa, Florida

Henderson, Nevada

Las Vegas, Nevada

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Gardener's Notes:

9
positives
0
neutral
0
negative
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M
M
Las Vegas, NV (Zone 9a) | September 2015 | positive

Very very slow growing. Does well in the Vegas heat however does best with partial shade in the afternoon as I've seen it get sunburned a...Read More

D
Laredo, TX (Zone 9b) | October 2014 | positive

I really like this cactus and can't find anywhere. If anyone would like to trade or sell and help me out let me know. It would be awesome...Read More

I
Henderson, NV | July 2014 | positive

The plant was approximately 1.5 inches tall when planted. It is now about 5 feet tall and appears to be bifurcating. Is this normal?

M
North Olmsted, OH (Zone 6b) | February 2013 | positive

This is by far my favorite cactus species. A very slow grower, it's white fuzzy hairs are an eye catcher in any collection.

B
Hayward, CA | October 2005 | positive

In the top 5-maybe 3, in the must have cacti,right there with golden barrel and Cereus peruvianus . The girth of the trunk and denseness ...Read More

H
H
Castro Valley, CA (Zone 9a) | January 2005 | positive

Also known as 'Old man of Mexico', 'Bunny Cactus', synonym: Cactussenilis & Pilocerous Sennilis. Is from Eastern Hidalgo in Mexico. Soil ...Read More

S
Santee, CA | November 2004 | positive

Enjoyed your photo and description. My in-laws have a 42 year old (I submitted photo, too) cactus of this variety that measures over 17 f...Read More

T
Tucson, AZ (Zone 9a) | July 2004 | positive

We call this one the Old Man of Mexico to help distinguish it from a number of other "Old Man" cacti such as Old Man of the Andes (Oreoce...Read More

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

Can grow very tall, covered with thick white 'hairs' that cover up the spines below (careful). EAsy grower in California, though can get...Read More

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