Echinopsis Species, Achuma, Aguacolla, Saint Peter Cactus, San Pedro Cactus

Echinopsis pachanoi

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Echinopsis (ek-in-OP-sis) (Info)
Species: pachanoi (puh-KAH-no-ee) (Info)
Synonym:Trichocereus pachanoi
Synonym:Cereus pachanoi


Cactus and Succulents

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Sun to Partial Shade


Foliage Color:

Unknown - Tell us


12-15 ft. (3.6-4.7 m)

15-20 ft. (4.7-6 m)

20-30 ft. (6-9 m)


4-6 ft. (1.2-1.8 m)


USDA Zone 8b: to -9.4 C (15 F)

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)

Where to Grow:

Can be grown as an annual

Suitable for growing in containers


All parts of plant are poisonous if ingested

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

Bloom Color:

White/Near White

Bloom Characteristics:

Flowers are fragrant

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Summer

Other details:

Unknown - Tell us

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; direct sow outdoors in fall

Seed Collecting:

Remove fleshy coating on seeds before storing

Allow unblemished fruit to ripen; clean and dry seeds

Properly cleaned, seed can be successfully stored


This plant is said to grow outdoors in the following regions:

Birmingham, Alabama

Gilbert, Arizona

Green Valley, Arizona

Phoenix, Arizona(3 reports)

Alpine, California

Apple Valley, California

Capistrano Beach, California

Davis, California

El Macero, California

Escondido, California

Fresno, California

Garden Grove, California

Hayward, California

Highgrove, California

Huntington Beach, California

Los Angeles, California

Mckinleyville, California(2 reports)

Ontario, California

Pasadena, California

Pittsburg, California

Pomona, California

Rosedale, California

San Diego, California

San Francisco, California

San Jose, California

San Leandro, California

Spring Valley, California

Templeton, California

Union City, California

Vacaville, California

Ventura, California

Crystal River, Florida

Land O' Lakes, Florida

Miami, Florida

Tampa, Florida

Kenner, Louisiana

New Orleans, Louisiana(2 reports)

Henderson, Nevada

Las Cruces, New Mexico

Grenoble, Rhône-Alpes

Cookeville, Tennessee

Lafayette, Tennessee

Austin, Texas

Dallas, Texas

Houston, Texas(2 reports)

show all

Gardeners' Notes:


On Mar 21, 2015, debylutz from San Diego, CA (Zone 10a) wrote:

I bought a 1 gallon pot with two cuttings at Home Depot about a year ago. I repotted each cutting into its own 1 gallon pot. Presently, each cutting is over 30 inches tall with 1 to 2 offshoots. I love this cactus! It has very small spines. I plan to use it in a Mexican-style landscape.


On Dec 2, 2013, martenfisher from Crystal River, FL wrote:

Would be nice to see less information about these being psychoactive. We get the point already. I want to see more cultivars being produced for bloom yield than mescaline yield. This wonderful plant is a great beginner cactus and landscape plant. I think most plants are lost from rich soil and over fertilizing creating a more tender sensitive plant. It needs the alkaloids for defense and plants that are soft and babied will rot or fall over. I find these at lowes and Home Depot every spring or summer.


On Mar 29, 2011, succulentlab from Fresno, CA wrote:

I absolutely love this plant! This is the species of cactus that first got me into succulents. Grows extremely well in central valley CA. I have one specimen that grew over 24" in a single season... WOW!


On Sep 3, 2009, MelisandeLuna from Birmingham, AL wrote:

I've been growing these for years out in Bakersfield, California. I dragged one to New Orleans with me and left most of it at a friend's house, I took a piece with me to Alabama, but the cold killed it (sub zero). I just recently bought one from a vendor in California, I think I'll have to bring it inside to over-winter so I don't lose it again.


On Aug 2, 2009, homerplant from Lecompton, KS wrote:

People don't realize how cool and amazing this plant really is. If a piece were to break off and fall under cover or just can't find light for some reason. It will send a little, skinny, usually white in color, piece to find the sun. Once the sun is found. That is where it starts to green up and become plump.
I have to put them away for the winter here in Kansas. 5 months later, I open up the box and they will still grow and search. No water no light. In the spring if the white shoot is too long and can't support itself. I cut it off. You can cut any Pachanoi and it will grow pups. As long as you have 3 - 6 inches they will grow. Let the half that will be put back in the ground to callus over before planting. This takes 3 or 4 days depending on the humidity. The part that is sti... read more


On Jul 3, 2008, superpepper from Lauderhill, FL (Zone 10a) wrote:

I found this cactus abandoned and took it home. In the 3 or so months I have had it, it has grown several inches and developed several flower buds. Probably one of the easiest and most attractive cactus I have grown.


On Oct 10, 2006, promethean_spar from Union City, CA wrote:

When I bought my house in Fremont, CA, one of these was abandoned out front in a 3g pot. I just left it where it was and watered it during the summer and it grew about a foot and added a new arm from the base. It appears to have flower buds right now, unfortunately they're supposed to be self-sterile so I doubt I'll get seed.

I got seed for a few other hardy species of it's genus and hopefully will have a row of tall cacti in a few years.


On Nov 16, 2005, slimmy from Lisboa,
Portugal wrote:

I'm growing this cactus for about 2 months from seeds, and I think that they are doing fine. It's almost winter here in Portugal, lots of rain and pretty cold, but they look like tiny candies, fat, bright and succulent. I'm enjoying it. regards


On Mar 26, 2005, Hekate from Austin, TX (Zone 8b) wrote:

This is the only cactus I own and so far I rather like it. In the spring it will put out a bud which will become another long cactus spike. They get very tall and heavy so it's important to make sure the plant doesn't go through a stressed period that will create weak parts which will cause toppling later on. I have never seen mine flower, but that is likely due to my own inexperience.


On Jan 23, 2005, Xenomorf from Phoenix, AZ (Zone 9b) wrote:

Flowers are white, fragrant and nocturnal (another night blooming cereus).
The people of Tarahumara and Seri of Mexico have long used this plant for medicinal purposes, one being, the essence is applied to the scalp to prevent baldness.


On Dec 30, 2004, rh3708 from Westmoreland, TN (Zone 7a) wrote:

It is a fast growing cactus I have it growing in a large pot of Peace lily's.
I would like to set it out in the yard but haven't found just the right spot yet.


On Jun 21, 2004, tyler70006 from New Orleans, LA wrote:

This is the easiest and fastest growing cactus I've owned. Grows about a foot a season and will tolerate a lot of rain without rot. We have very hot summers in New Orleans and this cactus loves the heat. Will die and become a cactus shaped ice cube in a freeze. I use ordinary potting soil and fertilizer.