ABOVE: Perlite is a key ingredient in fine potting soils.
BELOW: Flowers propagated in perlite-enhanced potting soil.
ABOVE: Swiss Chard growing in the roof garden of an organic grocery store in Chicago.
BOTTOM: Orchid ODONTOGLOSSUM variety grown in perlite.
Perlite for Horticulture
When perlite ore is expanded or “popped” by rapid, controlled heating, it expands up to 15 times its original volume and takes on a foam-like cellular appearance — essentially clusters of microscopic glass bubbles, creating a porous structure. This physical transformation makes expanded perlite an extremely effective aggregate for use in horticultural growing mixes – or, by itself, as a medium in hydroponic growing and as a rooting medium. (For a detailed explanation of perlite expansion, see PDF Infosheet: Why Perlite Works).
(linked PDF files from the Perlite Institute Library)
- Indoor Gardening with Perlite
- Cultivation of Spruce Seedlings in Mixtures of Perlite and Sphagnum Peat in Norway
- Perlite Gradation and Peat/Perlite Mixtures
- Gardens in the Sky: Growing Food on Rooftops [NEW]
- Roof Gardens that are Gentle on the Roof [NEW]
- Container Growing with 100% Perlite and Perlite /Peat Mixes
—IN THE GROUND
- Horticultural Perlite - The Natural Growing Media for Outdoor Gardening
- Effective Watering with Horticultural Perlite
- The Role of Perlite in Hydroponic Culture
- Hydroponic Culture of Strawberries in Perlite
- Growing Orchids in Perlite [REVISED]
- Growing Snapdragons in Perlite [NEW]