Trichocereus Spachianus
The Trichocereus Spachianus, also known as the “Argentine torch cactus”, is a large columnar cactus with upright, ribbed stems capable of reaching several meters in height. It is particularly appreciated for its fast growth, spectacular flowering, and great robustness.
Its stems are green to blue-green, cylindrical, with 10 to 15 well-defined ribs, covered with fine white areoles from which pale yellow to light brown spines emerge. When grown in pots, it remains more compact but can easily exceed 1 meter over time.
What makes the Trichocereus Spachianus truly special is its summer flowering: large white trumpet-shaped flowers open in the evening and last until the next day. These highly fragrant flowers can measure more than 20 cm in diameter.
In its natural habitat, it thrives in very sunny conditions, on well-drained soil, with a marked alternation between the rainy season and the dry season.
🌞 Full sun: at least 6 to 8 hours per day to ensure harmonious vertical growth.
🌤️ Young plants: provide light shading during sudden heatwaves.
💡 Indoors, a south-facing window is essential.
🌱 Spring / summer: Water every 2 weeks, allowing the substrate to dry completely between waterings.
🍂 Autumn / winter: Stop watering as soon as temperatures drop below 10°C.
⚡ Golden rule: Avoid any stagnant moisture, especially at the base of the stem.
🌞 Ideal temperature: between 20°C and 30°C.
❄️ Cold tolerance: tolerates down to -5°C if completely dry and mature.
🏠 Wintering: In pots, bring indoors below 5°C and keep dry, cool, and bright.
🪨 Ideal substrate: 50% cactus potting soil + 25% pumice + 25% pozzolana.
💡 Tip: add a layer of gravel under the stem to prevent stagnant moisture.
🌼 Season: from June to August, often in the evening.
🎨 Color: pure white, with an enchanting sweet fragrance.
🕑 Duration: each flower lasts 1 to 2 days, with several waves possible.
💡 To encourage flowering: a dry winter rest is necessary.
