Tr. chalaensis x OP – Craig

Details

Trichocereus chalaensis

Trichocereus chalaensis is a Peruvian Trichocereus species that is closely related to Trichocereus glaucus. Its alternative Echinopsis name is Echinopsis chalaensis (Rauh & Backeberg). I treat it as a correct species in the genus Trichocereus until DNA testing is able to disprove this. Right now, the name Echinopsis chalaensis is still formally valid, but it´s just a matter of time until the new findings and decisions on the taxonomy of these former Echinopsis Trichos will lead to the official revival of the genus Trichocereus and some of its former species. I follow Joel Lodé´s system, which lists the plant as Trichocereus chalaensis (Rauh & Backeberg).

The type locality & origin: Peru, Arequipa. Chala in the south of Peru. This species was  collected by various field botanists, including Friedrich Ritter & Rauh. Rauh´s collection number is “Rauh K128” and Friedrich Ritters FR number is FR1052. The type is common in the southern parts of Peru and usually grows creeping down slopes, similar to Trichocereus glaucus var. pendens. Because of that, it´s possible they are at least partially synonymous.

Tricho.net

Growing Requirements:

Trichocereus are relatively easily grown in the UK, especially due to the fact that they do not require massive amounts of sunlight. As most cacti grown in the UK, they are best grown in a greenhouse or conservatory (grow tents are also used for younger plants), South facing is a distinct advantage.

Watering

Watering from Spring (April) to beginning of Autumn (End September). Depending on what kind of summer we get will depend on how frequent you need to water, but, less is better with cacti. During the winter months, little to no watering is required or the roots could rot (they do not like to be wet for long periods).

Substrate

In warmer climates, you could go for a more nutrient rich mixture (50% organic / 50% inorganic). But, in the UK, it is best to err more on the side of inorganic (60% – 70% inorganic) to ensure the pot is drained quickly.