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Split-Leaf Philodendron (Thaumatophyllum) Yellowing, Brown Spots & Soil Bugs

A sentimental split-leaf philodendron (from a funeral) has yellow leaves, brown spots, and tiny silvery bugs in the soil that move when blown on. The bugs are likely springtails or fungus gnat larvae—not harmful.

Real Issues

Yellowing and brown spots indicate cultural problems. The expert needs:

  • Light source & distance
  • Watering frequency
  • Recent repotting?
  • Water hardness
  • Sticky residue on leaves/surfaces?

Likely Causes

  • Overwatering / poor drainage
  • Low light
  • Hard water
  • Fertilizer buildup

Action

Email a photo for ID. Adjust light (bright indirect), water when top inch dry, use filtered water, flush soil. The soil bugs are a distraction—they’re not the problem.

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