Small Lava Rock

Lava rock is a high quality for hydroponic orchid growing.  Lava rock provides more air to the roots, and less moisture than in more typical fir bark media, and does not decompose, which means less repotting.  This is especially great for orchids which do not like to be moved. This size is suitable for orchids such as Cattleyas and Phalaenopsis  3 litres.