Biochar is a stable, carbon-rich material produced from the thermal decomposition of organic matter in a low-oxygen environment, a process known as pyrolysis.
Mulch refers to any material, organic or inorganic, spread over the surface of the soil to protect it, enhance its appearance, and support plant growth.
Soil testing in Autumn, just after the main growing season, provides a clear picture of nutrient levels and pH status after plants have absorbed their share.