Emm's Plant House

Lemaireocereus Pruinosus 10.5cm H15cm

£6.00 GBP

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Pot Size 10.5cm H15cm

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Lemaireocereus pruinosus, also known as the Gray Ghost Cactus, is a tall, columnar cactus with smooth, grey-green stems and prominent ribs. Native to Mexico, it’s prized for its elegant architecture, drought tolerance, and ability to thrive in bright, sunny environments.

Full Botanical Name: Lemaireocereus pruinosus
Common Names: Gray Ghost Cactus, Organ Pipe Cactus
Country and/or Region of Origin: Mexico
Growing Conditions in Native Habitat: Arid scrublands and rocky slopes with poor, sandy soil and intense sunlight

Care Guide

Care Guide:

Light: Full sun; thrives in very bright conditions

Ideal Room: Conservatory, greenhouse, or bright windowsill

Feeding: Cactus fertilizer every 6–8 weeks during spring and summer

Humidity: Low; prefers dry environments

Ideal Temperature: 20–35°C; protect from frost below 10°C

Watering: Deep watering when soil is completely dry; water sparingly in winter

Pet/Child Safe: Non-toxic (genus level) — safe for pets and humans, but sharp spines can puncture skin or cause irritation if handled

Soil Type: Coarse, mineral-based cactus mix with excellent drainage

Propagation: Stem cuttings after callousing or by seed

Eventual Height and Spread: Indoors 1.5–2 m; outdoors 10 m+ in native conditions

Growth Rate: Moderate to fast in high light and warmth

Pests and Treatment: Mealybugs and scale insects; remove manually or treat with neem oil

Repotting: Every 2–3 years in spring with fresh cactus mix

Pruning: Rarely required; remove damaged sections only

Air Purification: Minor; enhances air oxygenation

Folklore: In Mexican culture, columnar cacti symbolize protection and endurance

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