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Pilosocereus magnificus seeds

PierreBraun

Accepted Scientific Name:

Pilosocereus magnificus

Synonyms:

Pseudopilocereus magnificus

Common Names:

Often called “Facheiro” in Brazil and commonly referred to as a Blue Brazilian Torch Cactus or simply Blue Columnar Cactus.

Plant Origin:

Pilosocereus magnificus seeds

Pilosocereus magnificus

Native to Brasil’s arid interior, Pilosocereus magnificus grows in small trees or clumping columns. When mature, it can reach 1.5–5 m tall, forming a clear trunk and multiple erect, smooth stems, each 4–7.5 cm wide. Its most distinctive feature is a persistent glaucous blue-green epidermis, which remains vivid even under intense sun—earning it a place among the most visually striking Pilosocereus species.

Ribs & Spines

Each stem sports 5–12 ribs, marked by subtle transverse grooves near the apex. Areoles are spaced along these ribs, often grouped, and outfitted with golden-yellow to amber radial spines (up to 10 mm) plus 8 central spines reaching 1.5 cm long, giving the plant a radiant contrasting armament.

Flowers & Fruits

In spring and summer, tubular night-blooming flowers (~6 cm long, 2.3 cm wide) emerge from the cephalium zone atop mature stems. These blossoms give way to globose fruits (2.5–3.5 cm), splitting to reveal vivid magenta flesh studded with black seeds—a treat for wildlife .


Growing from Seed

Cultivating P. magnificus from seed is gratifying yet requires patience and conditions mimicking its natural habitat:

Substrate: Use a coarse, fast-draining mix—equal parts cactus potting soil, pumice, and sharp sand. 
Conditions: Maintain a warm environment (22–28 °C / 72–82 °F) with bright, indirect light.
Humidity: Cover with clear plastic or dome until seedlings sprout in 2–4 weeks.
Aftercare: Harden off gradually; increase light and airflow as they grow.
Watering: Water thoroughly during growth, allow the substrate to dry fully before re-watering.
Fertilizer: Once yearly in early spring with a cactus-specific formula is sufficient .


Temperature & Water Management

  • Temperature: Thrives in 70–95 °F (21–35 °C) during active growth. It can briefly endure down to ~30 °F (−1 °C), but prolonged frost exposure can cause tissue damage .

  • Watering: Weekly in summer; bi‑weekly in spring. Withhold water in autumn and winter to avoid root rot consultaplantas.com.


Why Grow P. magnificus?

  • Striking blue-glaucous stem and contrasting golden spines make it a focal point in desert and succulent gardens.

  • Adapted to harsh climates—ideal for xeriscaping in hot, arid regions.

  • Towering form: impressive vertical structure even in containers.

  • Wildlife-friendly: nocturnal flowers and fruit appeal to pollinators and birds.

  • Conservation: Listed as Endangered by IUCN, cultivating from seed helps buffer wild population decline