Tephrocactus Species, Pine Cone Cactus, Spruce Cone Cholla

Tephrocactusarticulatus var. diadematus

Family
Cactaceae (kak-TAY-see-ee)
Genus
Tephrocactus (tef-roh-KAK-tus)
Synonym
Opuntia diademata
Tephrocactus diadematus
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Deciduous
Height
18-24 in. (45-60 cm)
Spacing
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
Hardiness
USDA Zone 9a: to -6.6 °C (20 °F)
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
White/Near White
Bloom Time
Mid Spring
Other Details
Category
Cactus and Succulents
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
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
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:

Bullhead City, Arizona

Carefree, Arizona

Phoenix, Arizona(2 reports)

Queen Creek, Arizona

Scottsdale, Arizona

Tucson, Arizona

Fontana, California

Reseda, California

San Jose, California

Spring Valley, California

Thousand Oaks, California

Vacaville, California

Las Vegas, Nevada

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Gardener's Notes:

5
positives
1
neutral
0
negative
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C
Scottsdale, AZ | May 2013 | positive

I was given a cutting of this plant 4 years ago, and from that original plant, I now have several healthy plants around my yard. This ye...Read More

T
Picture Rocks, AZ | May 2012 | positive

Last fall, I put two small spruce cone cholla in a concrete planter in full sun. Used standard cactus mix from big-box store. This spring...Read More

G
Las Vegas, NV | January 2012 | positive

Easy to grow, easy to handle, but beware. They do have some very fine glochids (irritating spines/hairs), but they are not as prevalent...Read More

A
Tucson, AZ | October 2004 | positive

This is an extremely slow growing plant. My mother was given a piece of it 15 years ago. Everytime a piece would fall off, I'd stick it...Read More

X
Phoenix, AZ (Zone 9b) | August 2004 | neutral

The 'inermis' form of this species-variety is the one with no glochids. This non-inermis form does have very tiny irritating glochids tha...Read More

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

This is one of the easiest and safest cactus I have ever grown. Cool looking pine-cone-like plant- suckers profusely and easy to grow by...Read More

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