Description Specs FAQs Great for Propagation! In horticultural applications, 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. Other horticultural applications for perlite are as a carrier for fertilizer, herbicides and pesticides and for pelletizing seed. Horticultural perlite is as useful to the home gardener as it is to the commercial grower. It is used with equal success in greenhouse growing, landscaping applications and in the home in house plants. Each white granule is comprised of tiny closed air cells or bubbles which account for the light weight, reflectivity, adsorptive capability, and superior insulating qualities. The surface of each granule is covered with tiny cavities providing a large surface area capable of retaining water, air, and nutrients. This physical structure makes Horticultural Perlite an ideal growing medium, providing optimum air-water relationships for efficient plant growth. Since Perlite is a form of natural glass, it is classified as chemically inert. pH ~ 7 Additional Information U.S. Mesh Inches Microns MM 3 .265 6730 3.73 4 .187 4760 4.76 5 .157 4000 4.00 6 .132 3360 3.36 7 .111 2830 2.83 8 .0937 2380 2.38 10 .0787 2000 2.00 12 .0661 1680 1.68 14 .0555 1410 1.41 16 .0469 11902 1.19 18 .0394 1000 1.00 20 .0331 841 .841 25 .0280 707 .707 30 .0232 595 .595 35 .0197 500 .500 40 .0165 420 .420 45 .0138 354 .354 50 .0117 297 .297 60 .0098 250 .250 70 .0083 210 .210 80 .0070 177 .177 100 .0059 149 .149 120 .0049 125 .125 140 .0041 105 .105 170 .0035 88 .088 200 .0029 74 .074 230 .0024 63 .062 270 .0021 53 .053 325 .0017 44 .044 400 .0015 37 .037 550 .009 25 .025 Perlite MSDS [PDF]
