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What are Pine Bark Fines?

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What are Pine Bark Fines? Photo © Jon VanZile
Definition: Aged pine bark fines are small pieces of pine bark frequently used as a soil conditioner or in some container mixes. Pine bark fines are slow to decompose, thus providing structure to custom potting mixes and improving drainage. When used as a main component of a potting mix, along with sphagnum peat, perlite and dolomite lime, pine bark fines provide a longer lasting container mix than one based on spaghnum peat moss. Pine bark fines can be difficult to locate, but they are sometimes seen in garden centers labeled “soil conditioner.” Check the product label for “aged pine bark” or “pine bark fines.”
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