Trichocereus Pachanoi Care Instructions

In desert gardening circles, the San Pedro cactus is perhaps the favorite columnar cactus. Trichocereus pachanoi [try-koh-KER-ee-us puh-KAH-no-ee] gets its name from the bushy (tricho) flower tube.

This Trichocereus (Echinopsis cactus) is native to Argentina, Bolivia, Chile, Ecuador, and Peru in South America. San Pedro PinPachanoi cactus with darkish inexperienced stems.

H. Friedrich and G. D. Rowley combined the genera Trichocereus and Echinopsis in 1974. (ek-in-OP-sis, referring to an analogous look to sea urchins). While the genus Echinopsis pachanoi is now valid, there is a drive to resurrect Trichocereus as the only genus because to irreconcilable variances within the genera.

J. N. Rose, an American botanist, cataloged the plant and named it after Ecuadorian professor Abelardo Pachano.

Because of its repute, the cactus (most often known as San Pedro) has 25 distinct common names in Spanish alone.

Andachuma, gigantón, huachuma, and wachuma are a few examples. It was used for tribal medicinal and religious purposes in the past. Trichocereus species are found across the Andes highlands, with San Pedro being endemic to elevations ranging from 6,600′ to 9,800′ ft. There are a total of five pachanoi species. It should also be noted that a close relative, the Peruvian torch cactus (Trichocereus peruvianus), is so similar that the two species are essentially equivalent.

Measurement and Progress of San Pedro Cactus Care and Cultural Necessities

The San Pedro cactus is a fast-growing, multi-stemmed shrub or small tree that can grow to be as much as 5.9′ wide and 19.7′ tall.

Individual stems range in thickness from 2.4″ to 5.9″ and should contain between 4 and 8 ribs. The spines are either light brown or dark yellow. These cacti may grow up to 1′ foot every year if given the right quantity of hydration, sunlight, and soil. The stems range in color from mild inexperienced to blue-green, darkish inexperienced, and upward traveling via areoles with age.

Perfume and Flowering

In July, San Pedro buds are pointed and produce a fluted pale bloom.

The scented blooms are around 8.7″ inches in diameter and bloom in the evening.

The fruit is covered in black or brown hairs and scales and measures 1.9″ to 2.4″ in length and 1.2″ in diameter.

Temperature & Mild

After the main year, San Pedro thrives in direct sunlight, while seedlings may suffer sunburn in direct sunlight.

Overall, Trichocereus pachanoi thrives well in light shade throughout the hot summer months.

You should gradually expose a plant that has spent the winter indoors to direct sunlight, since they may become sunburned if transplanted directly.

Crops growing indoors will require additional illumination from develop lamps.

A healthy San Pedro can withstand temperatures as low as 50° Fahrenheit (10° C) with the rare transitory dip as low as 15.8° Fahrenheit (-9° C).

This resilience to cold can also be increased by utilizing Valerian flower extract.

It may flourish in USDA hardiness zones 8B to 10B.

Feeding and watering

This cactus, like many succulents, will lie dormant in the colder months and should not be watered between October and April to reduce the risk of rot.

Seedlings are frequently administered a very diluted fertilizer combination, but adults can be fed an undiluted concentration.

If you must feed, use a diluted liquid fertilizer and only fertilize during the growing season.

Soil and Planting

Trichocereus pachanoi demands fertile, somewhat acidic potting soil with enough drainage.

A small amount of humus works best to reduce the risk of rot.

Seedlings will benefit from a little amount of highly diluted fertilizer, whereas adults can handle larger volumes.

After one year, seedlings can be securely moved to pots.

Grooming and Maintenance


  • Trichocereus pachanoi can be trimmed for grafting or pupping as well.
  • Because larger crops grow faster, you’ll need to snip 12″ inches or more.
  • For a healthy plant, no other upkeep is required.
  • Cactus plants may also be low-maintenance.
  • Make sure the soil is well-drained.
  • As a pure insecticide, a small amount of sulfur or diatomaceous earth put to the soil works well.

Trichocereus Pachanoi Propagation

San Pedro seeds are relatively tiny and easy to proliferate using the Fleischer method.

You will require the following items:

  • Clear glass jars with lids (akin to mason jars or salad containers) or plastic wrap
  • A blend of high-quality sand and planting soil (potting soil will increase the danger of rot)
  • A bottle with sprigs
  • Seeds that are less than ten years old (inside one yr are probably the most viable)

Planting the Seed

  • Fill the container halfway with the potting soil mixture.
  • Stage the soil and gently push it down to provide a stable foundation for the seedlings.
  • Sprinkle the seeds over the soil and let them to settle on top.
  • Mist the soil and canopy lightly with water and cover with lids or plastic wrap.
  • Place the containers in a sunny location where they will not be exposed to direct sunlight.
  • You might alternatively use an LED light rated at 150 watts or more.
  • More about increase in artificial light.
  • The temperature should be kept between 77° and 86° Fahrenheit (25° – 30° Celsius).
  • Seeds should germinate in two to three weeks.
  • A seed that does not germinate in 6 weeks or shows signs of white mould on the seed itself is likely to die.
  • Open the cover and let the dirt dry before starting over.

If you find signs of fungus gnats, you should also open the lid to allow them to dry.

Mold indicators in the jar should be washed away using the spray bottle, and the jar should be allowed to dry before reclosing.

Beware: the market is flooded with low-quality seeds.

When planning to self-germinate, you need check the seed’s age.

The younger they are, the greater their chances of successful germination.

NOTE: Vegetation grows from offsets.

Trichocereus Pachanoi Pest or Disease Problems

When overwatered in hot weather, all Trichocereus species are susceptible to deadly fungal diseases and infections.

Damping off, orange rot, and witches broom disease are examples of these.

Black rot is typically harmless and can mend itself within a short period of time.

Root mealybugs, scale, and spider mites might all be a problem.

Neem oil sprays are used to safely manage them.

Discover how to use Neem as a drench.

When found early, scale is easily removed.

Prompt San Pedro Cactus Utilizes

The San Pedro cactus, like many succulents in the Cactaceae family (and across the Andes and Amazon basin in general), has long been prized by indigenous for medical and spiritual purposes.

Within the US, it has grow to be a viable substitute for peyote throughout hallucinogenic rituals as a result of presence of mescaline.

This cactus is incredibly attractive and would look great in any desert-themed garden or as an interior ornamental plant.

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