Soil Dynamics

Organic Slow-Release Fertiliser: What It Is, How It Works, and Which Soils Need It Most Most fertilisers marketed as "slow release" use a polymer coating that can fail in Australian heat. Genuinely organic slow-release works differently; it works through soil biology. This guide explains the mechanism, the differences between Australian soil types, and how to choose the right product for your conditions. How organic slow-release fertiliser actually works The phrase "slow release" appears on hundreds of fertiliser labels,  including products that are entirely synthetic. To understand what makes organic slow release genuinely different, you need to understand the mechanism behind it, because the mechanism is everything. Organic slow-release fertilisers use a physical barrier,  a polymer or sulphur coating,  to control how quickly concentrated soluble nutrients dissolve into the soil. The coating is engineered to degrade at a predictable rate. In cool, moist European...