Tephrocactus Species, Pine Cone Cactus, Pinecone Cactus, Spruce Cone Cholla

Tephrocactus articulatus f. inermis

Family
Cactaceae (kak-TAY-see-ee)
Genus
Tephrocactus (tef-roh-KAK-tus)
Synonym
Tephrocactus articulatus var. inermis
Tephrocactus articulatus var. diadematus f. inermis
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Deciduous
Height
18-24 in. (45-60 cm)
Spacing
18-24 in. (45-60 cm)
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
N/A
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:

Carefree, Arizona

Chandler, Arizona

Chandler Heights, Arizona

Goodyear, Arizona(2 reports)

Mesa, Arizona

Phoenix, Arizona

Tucson, Arizona

Yuma, Arizona

Las Vegas, Nevada

Las Cruces, New Mexico

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Gardener's Notes:

4
positives
1
neutral
0
negative
Sort By:
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D
D
Mesa, AZ (Zone 9a) | August 2021 | positive

We just love these in our yard near Phoenix, AZ. They thrive on neglect and grow nicely and flower with just a little supplemental water ...Read More

V
V
Las Cruces, NM | January 2017 | neutral

It has lived outside in Las Cruces, NM for 12 years. It has gone through a few snow covers including our "big freeze". I use long tongs...Read More

S
Goodyear, AZ | June 2011 | positive

Fun plant to have. Produces many branches that will fall off and can be planted after a week or two of drying. Tips of the "pinecone" h...Read More

J
Yuma, AZ | May 2009 | positive

Fascinating cactus! I have had this plant for many years, growing in my front yard (xeriscape). My long and slender speciman moves back...Read More

X
Phoenix, AZ (Zone 9b) | October 2004 | positive

This particular form "inermis" [aka- harmless] has no spines or glochids.

This plant is a sub-variety or Forma of "Tephroc...Read More

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