Peat moss comes in many grades

Because peat moss is a natural product, there are degrees of variation and not all peat moss grades are adequate for a particular blend you will find on the market.

Field grades of peat moss are screened, blended and processed to achieve specific physical properties for market grades and intended use. Market grades are based on coloration of the peat moss and the particle size passing through different mesh screen sizes (10, 20, 50 and 100 mesh screens).

Some of the common market grades include black peat, coarse/chunk peat, horticulture grade, fine, forestry and so forth.

Read more at PRO-MIX (Jose Chen Lopez)

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