Description
Pilosocereus azureus, commonly known as the Blue Torch Cactus, is a striking columnar cactus native to Brazil. Its tall, cylindrical stems are a beautiful bluish-green hue with prominent ribs, giving it a dramatic architectural presence. This cactus is drought-tolerant, relatively fast-growing, and perfect for adding a bold statement to both indoor and outdoor collections.
- Full Botanical Name: Pilosocereus azureus
- Common Names: Blue Torch Cactus
- Country and/or Region of Origin: Brazil
- Growing Conditions in Native Habitat: Thrives in sunny, rocky areas with well-draining soil, experiencing seasonal rainfall and long dry periods.
- Care Guide:
- Light: Requires bright, direct sunlight. Partial shade is tolerated but reduces optimal growth and coloration.
- Ideal Room: Sunny windowsills, conservatories, or outdoor gardens in warm climates.
- Feeding: Fertilize monthly during spring and summer with a cactus-specific fertilizer. Do not feed in winter.
- Humidity: Low humidity preferred; suited to dry environments.
- Ideal Temperature: Thrives between 20–30°C (68–86°F). Protect from frost and temperatures below 10°C (50°F).
- Watering: Water thoroughly during the growing season, allowing soil to dry completely between waterings. Minimal watering in winter.
- Pet/Child Safe: Spiny; not safe for pets or children if touched or ingested.
- Soil Type: Well-draining cactus or succulent soil mix, amendable with sand or perlite.
- Propagation: Propagate via stem cuttings. Allow the cut ends to callous before planting in well-draining soil.
- Eventual Height and Spread: Can grow up to 4–5 meters (13–16 feet) tall in outdoor conditions, with multiple branching stems over time.
- Growth Rate: Moderate to fast; stems elongate quickly under bright light.
- Pests and Treatment: Susceptible to mealybugs and spider mites; treat with neem oil or insecticidal soap.
- Repotting: Every 2–3 years or when root-bound. Ensure excellent drainage to prevent root rot.
- Pruning: Remove damaged or unhealthy stems carefully, wearing protective gloves.
- Air Purification: Primarily decorative; minimal effect on air quality.
- Folklore: Symbolizes strength, endurance, and resilience due to its ability to survive harsh, arid conditions.
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