a layer of material below the soil surface; materials used to provide plant support. regulate moisture. and (in many cases) provide mineral nutrients to container plants.

Merriam-Webster Online Dictionary
substrate (noun)
- substratum
the base on which an organism lives - the soil is the substrate of most seed plants
a acted upon (as by an enzyme) - substance
substrate (Wikipedia)

Substrate may refer to:

« Back to Glossary Index