Soils and Other Growing Methods
Coarse fibers extracted from the husk of coconuts. Coir is PH neutral and used as a soil additive due to its outstanding capacity to hold water, excellent air space and drainage. Naturally weed and disease free, coir can also be an ideal medium for starting seeds and cuttings. Coir is usually packaged in dense bricks that expand when hydrated.
A man-made growing medium made by melting basalt with limestone and spinning the hot compound into fibers. Rockwool is one of the most commonly used substrates in commercial hydroponic production due to its inert properties, natural sterility and its high water holding capacity. Rockwool is generally sold In individual cubes with prepared holes to hold rooted cuttings
A soilless growing medium composed of expanded clay pebbles. The pellets are PH neutral and retain moisture better than most hydroponic substrates. Hydroton retains its shape and allows for continuous oxygen exchange keeping roots healthy. Hydroton is very inexpensive and reusable.
A substrate made from recycled glass that can be used as a standalone medium in hydroponic growing, or as a soil additive. Growstones hold nearly equal amounts of air and water once saturated and wick water efficiently. Growstones are a popular among environmentally conscious growers because they can be reused or recycled.
A naturally occurring amorphous volcanic glass that has been expanded by heat. Perlite is used as an additive to increase drainage and aerate soil. It is also commonly used as a propagating medium for cuttings in hydroponic gardening.
A hydrous phyllosilicate mineral similar to mica. Vermiculite is extremely water absorbent and completely sterile. It can be used to lighten soil, as a medium for root cuttings and seed germination. Vermiculite works well with perlite in soil mixtures.
Image Provided By: Gleti/Shutterstock