Chichipe Cactus (Polaskia chichipe)

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Sunlight Requires 6–8 hours of full direct sunlight daily; tolerate partial shade during extreme midday heat in summer

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Watering Water deeply once every 1–2 weeks during active growth; allow soil to fully dry between waterings to prevent root rot

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Temperature Thrives in 18–32°C; tolerate brief dips to 5°C, but avoid prolonged frost or temperatures below 0°C

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Leaf: Reduced to small deciduous scales; sharp yellowish spines (1–3 cm) cover ribbed stems
Flower: Pale pink to white funnel-shaped blooms (3–4 cm wide) clustered at stem tips
Stem: Segmented green cylindrical stems with 5–7 prominent, rounded ribs

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Watering

Water deeply when top 10–15 cm of soil is completely dry

Fertilization

Diluted cactus-specific fertilizer once monthly. Discontinue fertilization during autumn and winter dormancy

Eggshell powder topdressing：Crush dried eggshells to fine powder; sprinkle 1–2 tbsp on soil surface every 3 months; avoid direct contact with stems

Pruning

Remove dead or damaged stem segments in early spring using sterile pruning shears
Trim overcrowded lower branches to improve airflow and maintain tree-like form
Avoid excessive pruning, as growth is slow and stems take time to regenerate

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No toxic compounds; spines may cause localized physical injury if contacted

Humans: Physical skin irritation from sharp spines; no systemic toxic compounds if ingested

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Culture: N/A

Usage: Ornamental xeriscaping; ripe fruits are edible and used in traditional Mexican cuisine