Basically anything that causes the worms "stress" can result in them balling up. They huddle to protect themselves. Things that can cause this are:

  • Temperature extremes: below 4° or above 26° Fahrenheit
  • Moisture extremes: too wet or too dry
  • Sudden changes in food supply or adding food they don’t like

To manage these conditions, see the “How do I keep my worms happy?” FAQ.

As long as your worms aren’t “jumping ship” in large numbers, it’s probably ok. Try to pinpoint the problem and alter conditions so your worms relax and move freely throughout the bin again.

Posted in: Troubleshooting

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