Zeilmann's Pincushion Cactus (Mammillaria zeilmanniana)

Zeilmann's Pincushion Cactus

Mammillaria zeilmanniana

Tiny globes dotted with soft spines, a desert gem for windowsills. Clumping succulent cactus; common name: Zeilmann's Pincushion Cactus.

Full sun
0.5/week
Beginner
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Plant Needs

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Sunlight Full sun to bright indirect light; protect from scorching midday sun in hot summer months
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Watering Allow soil to dry completely between waterings; avoid overwatering to prevent root rot
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Temperature Thrives in 18–30°C; tolerate brief light frost (down to 5°C) when soil is dry
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Characteristics

  • Leaf: Modified into 15–20 white radial spines per areole and 1–3 reddish-brown central spines
  • Flower: Bright pink, funnel-shaped blooms (1–2 cm wide) circling the cactus crown
  • Stem: Globular, green, with raised tubercles bearing spine clusters
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Care Guide

Watering

Water thoroughly when soil is fully dry; reduce frequency in extreme heat

Fertilization

Diluted low-nitrogen cactus fertilizer once monthly. Fertilize only during active growing seasons to promote blooming

Banana peel compost tea:Use fully composted banana peels, steep in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations
Pruning
  • Remove dead or shriveled offsets to maintain tidy growth
  • Trim damaged spines or discolored tubercles as needed
  • Separate overcrowded offsets in spring for propagation
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic; no adverse effects for cats

Humans: Non-toxic to humans; no known harmful effects from handling or accidental ingestion

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental succulent for rock gardens and small indoor planters