In horticultural applications, Agricultural Perlite is used throughout the world as a component of soilless growing mixes where it provides aeration and optimum moisture retention for superior plant growth. For rooting cuttings, 100% perlite is used. Studies have shown that outstanding yields are achieved with perlite hydroponic systems.
Other benefits of horticultural perlite are its neutral pH and the fact that it is sterile and weed-free. In addition, its light weight makes it ideal for use in container growing.
Perlite is not a trade name but a generic term for naturally occurring siliceous volcanic rock. The distinguishing feature, which sets perlite apart from other volcanic glasses, is that when heated to a suitable point in its softening range.
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