Argentine Pipe Cactus
Echinopsis 'Imperialis'

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

Category:

Cactus and Succulents

Height:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

36-48 in. (90-120 cm)

Spacing:

9-12 in. (22-30 cm)

12-15 in. (30-38 cm)

15-18 in. (38-45 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)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

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

Bloom Color:

Pale Pink

White/Near White

Bloom Time:

Late Spring/Early Summer

Foliage:

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:

Non-patented

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

Regional

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

Green Valley, Arizona

Phoenix, Arizona

Henderson, Nevada

Saint George, Utah

Gardeners' Notes:

1
positive
1
neutral
0
negatives
RatingContent
Positive

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

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.