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PlantFiles: Argentine Pipe Cactus
Echinopsis 'Imperialis'

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Echinopsis (ek-in-OP-sis) (Info)
Cultivar: Imperialis

Synonym:Echinopsis imperialis
Synonym:Trichocereus imperialis

Cactus and Succulents

18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

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

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)

Sun Exposure:
Full Sun
Sun to Partial Shade

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

Bloom Color:
Pale Pink
White/Near White

Bloom Time:
Late Spring/Early Summer

Unknown - Tell us

Other details:
Flowers are fragrant
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Suitable for growing in containers

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
From softwood cuttings
Allow cut surface to callous over before planting
From seed; stratify if sowing indoors

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By palmbob
Thumbnail #1 of Echinopsis  by palmbob

By Xenomorf
Thumbnail #2 of Echinopsis  by Xenomorf

By Xenomorf
Thumbnail #3 of Echinopsis  by Xenomorf

By Xenomorf
Thumbnail #4 of Echinopsis  by Xenomorf

By Xenomorf
Thumbnail #5 of Echinopsis  by Xenomorf

By Xenomorf
Thumbnail #6 of Echinopsis  by Xenomorf

By Xenomorf
Thumbnail #7 of Echinopsis  by Xenomorf

There are a total of 9 photos.
Click here to view them all!


1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive Canyonherder On Jul 16, 2006, Canyonherder from Saint George, UT wrote:

We have an Argentine Pipe Cactus that looks exactly like the one shown. The second year we had it it bloomed 3 times. The second blooming it had 16 large white trumpet shaped flowers, about 9 inches in diameter. I am looking to buy 2 or 3 more of these Echinopsis Hybrids with different colored flowers. They seem to like this area. THNX Canyonherder

Neutral Xenomorf On Jan 20, 2005, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

The sepals are pale green-grown; the petals are white; the pistil & stamens are pale yellow.


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

Green Valley, Arizona
Phoenix, Arizona
Henderson, Nevada
Saint George, Utah

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