This specification covers the material characteristics, physical requirements, and sampling, of soil or soil-like material for seed starter mix. Starter mix may include natural soils and mixtures of natural or artificial materials for use in initial germination of seeds to the cotyledon stage. Seed starter mix shall be able to provide a germinating seed with basic needs such as aeration, water retention, surface crusting resistance, nutrients, soluble salts, optimum pH, sanitation, and bulk density that does not inhibit root elongation. Materials for seed starter mix may include vermiculite, sphagnum peat moss, perlite, coarse sand, expanded shale, clay, slate, peat humus, other peat products, composted organic materials, and other organic and inorganic materials.
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1.1 This specification covers the material characteristics, physical requirements, and sampling appropriate to the designation of a soil or soil-like material for seed starting purposes. This would consist of the duration of germination ending after the cotyledon stage (at the opening of the first true leaves).
1.2 Seed starter mix may include natural soils and artificial mixtures of natural or artificial materials used for the initial germination of seeds to the cotyledon stage.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C330 Specification for Lightweight Aggregates for Structural Concrete
C331 Specification for Lightweight Aggregates for Concrete Masonry Units
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D2607 Classification of Peats, Mosses, Humus, and Related Products
D4531 Test Methods for Bulk Density of Peat and Peat Products
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
horticulture; peat; seed starter; seedings; soil ;
ICS Number Code 65.020.20 (Plant growing)
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