Stalite Slate is an all natural medium mined in the United States from volcanic slate which is then rotary kiln fired to over 2000 degrees. The material is then made into sterile granules or pieces that are extremely porous and PH neutral. It has the ability to aerate and also hold moisture/nutrients for orchid roots to seek. Because it is essentially a type of lightweight rock, it is extremely durable, and will not compress. It has low absorption yet the pores store vital moisture and nutrients for uptake.
Picture a sponge and then turn it to stone with all the spaces, holes and crevices retained. Used in extraordinary gardens and planting environments as varied and well known as Busch Gardens. Mount Vernon and the Jefferson Memorial, horticulturists and fine gardeners are adopting stalite for its extraordinary properties. We recommend using it as you would use volcanic rock, aliflor or other similar medias as part of a balanced mix for your prized plants. Incidentally, the structure of Stalite Slate granules is such that it also has been found to be a great barrier for voles in the garden as they detest the irregular and rough edges of it, the same qualities that orchid roots love! Chips vary from about 3/16 - 5/16 inch. Medium Stalite is also available.