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Root Rot in Mammillaria Spinosissima

How to identify and treat root rot in Mammillaria Spinosissima.

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Mammillaria Spinosissima care requirements

water
Water thoroughly during growing season when soil is completely dry. Minimize water in winter, watering only sparingly if at all.
soil
Very gritty, fast-draining cactus mix. Add extra perlite, pumice, or coarse sand to prevent moisture retention.
light
Full sun with 5–6 hours daily direct light. Bright indirect light acceptable in hot climates.
symptoms

Symptoms to look for in Mammillaria Spinosissima

  • fiber_manual_recordBrown, mushy roots
  • fiber_manual_recordWilting despite moist soil
  • fiber_manual_recordYellowing leaves
  • fiber_manual_recordFoul odour
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Common causes in Mammillaria Spinosissima

Caused by Pythium, Phytophthora, or Fusarium species in waterlogged conditions.

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How to treat root rot in Mammillaria Spinosissima

Remove plant, trim rotted roots, treat with hydrogen peroxide, repot in fresh well-draining soil.

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Preventing root rot in Mammillaria Spinosissima

Never overwater. Ensure drainage. Avoid compacted soil.

Root Rot in Mammillaria Spinosissima — Symptoms & Treatment | GreenScout