What causes green marks on laundry?

I recently started using a front loader / HE washer. Now my clothes have green marks on them after being washed.
Thanks for the answers, but I’m sure it’s not grass stains.

These may be calcium stains, but I’m not sure. There are small green spots on several shirts and pants from the past 2 laundry loads.

4 thoughts on “What causes green marks on laundry?”

  1. Green could be due to you copper piping, If your water has a high acid content the small amounts of copper from the piping could be affecting your wash.

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