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The pH of sphagnum moss is about:

  • A.2.0 - 2.5
  • B.3.5 - 4.0
  • C.5.0 - 5.5
  • D.6.5 - 7.0

Answer: B

The pH of sphagnum moss is about 3.5 to 4.0, which is acidic. This is why it is used in media for plants that need acidic conditions, such as orchids and blueberries.

2.0-2.5 is too acidic, and 5.0-7.0 are not the pH of sphagnum.

Sphagnum moss is acidic and holds many times its own weight of water. It is used in potting mixes and in packing for orchids and for air layering.

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