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Soluble salt and pH rollercoaster in fresh organic growing media

A freshly made organic growing medium that contains starter organic fertilizers should be allowed to “rest” for 2-4 weeks after mixing and before using it. This is especially true if a customer makes his/her own growing media as prepackaged growing media has had enough time to rest by the time the customer uses it.

Part of this reason is that the growing medium has low populations of microorganisms that break down organic fertilizer into useable forms. Once the populations of these microorganisms build up during the resting stage, the growing medium becomes “stable” and there is less fluctuation in its chemical properties.

In this article, PRO-MIX discusses the rollercoaster ride of changing pH and soluble salt levels that justifies a “resting” period for organic growing media.