Perlite (fine/plug grade, horticultural)
Vermiculite (premium grade horticultural)
Perlite and Vermiculite
Vermiculite is obtained by super-heating mica. It is a spongy material which particles are lightweight, soft, plate-like, and dark brown to golden brown in color. It provides aeration, moisture retention, ease of re-wetting, and consistent release of added fertilizer. Vermiculite has close to neutral pH.
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