Complete Guide to Growing Trichocereus in a Nursery

Growing Trichocereus is relatively simple if basic conditions are respected. These columnar cacti native to South America have perfectly adapted to the European Mediterranean climate, making their cultivation easy both indoors and outdoors.

Ideal Substrate for Growing Trichocereus

The substrate is perhaps the most critical factor for successful cultivation. Trichocereus require a highly draining substrate that prevents root waterlogging. A recommended mix is:

• 40% potting soil
• 30% perlite
• 30% coarse river sand

For species that require a more mineral substrate, such as T. terscheckii, the proportion of sand and gravel should be increased.

Proper Watering for Trichocereus in Nurseries

Watering should be adapted to the season. In spring and summer, during the active growth period, it is recommended to water every 7-10 days, allowing the substrate to dry completely between waterings. In autumn, the frequency should be gradually reduced. In winter, it is advisable to almost completely suspend watering, especially if temperatures drop below 10°C.

Light Requirements for Growing Trichocereus

Trichocereus need abundant direct sunlight, ideally a minimum of 6 hours daily. Lack of light causes etiolation, which manifests as stretching and weakening of the stem. If grown indoors, it is recommended to place them next to the brightest window, preferably south-facing.

Optimal Temperature for Trichocereus

Most Trichocereus tolerate a wide temperature range between 5 and 40°C. Many species withstand light frosts from -2 to -4°C if the substrate is completely dry. T. terscheckii is the most cold-resistant species, tolerating down to -8°C.

Pest Prevention and Control in Trichocereus

The most common pests in Trichocereus cultivation are mealybugs and mites. It is essential to regularly inspect the plants and act at the first symptoms. Neem oil is an effective and environmentally friendly preventive treatment to control these pests.