peat moss
noun/ˈpiːt mɒs/
/ˈpiːt mɔːs/
(also sphagnum, Sphagnum moss)
[uncountable]- a type of moss that grows in wet areas, used especially for planting plants in pots, making fertilizer, etc.
- Peat moss has traditionally been a popular component in potting mixes.
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peat moss