How long does Humus last in the soil?
Following the first application of Colloidal Humus, Humus will be active for the first six years, but declining in nutrients and minerals in each of the following years. Replacing with Colloidal Humus is recommended each successive season, especially for vigorous growing plants (vineyards, orchards, olive trees, etc). Tests have shown that even after thirty years of Humus being in the ground trace elements are still present. Over time Humus takes on a purple colour within the soil.
