Growing Medium / Soil additives

Growing media components are either organic or inorganic. Organic components include peat moss, bark, coconut coir, rice hulls, etc. Inorganic components include perlite, pumice, vermiculite, sand, hydrogel, etc. Some of these components hold water on their surface, others hold water within their structure, while others hold little compared to other components.

There are also components, such as perlite, that hold very little water, if any.  Keep in mind that a specific type of ingredient can vary in its water holding capacity and physical structure, depending on its origin and how it is processed. For example, bark can vary greatly in its source and structure depending on how it is processed, aged, composted and screened. This is also true for peat moss. Light brown, fibrous peat moss has a porous structure and can hold up to 16 times its weight in water.

However, if this same peat moss is processed into fine particles, the available water can be cut in half and the air porosity decreases dramatically. If you blend your own growing medium, your source materials should be consistent to produce a quality and predictable growing medium. It is important to know the structure as well as the chemical and physical properties of the ingredients you use to be sure that the growing medium blend you produce is the same, batch after batch.

Showing all 11 results