A Guide to Compost Accelerators & Starters

A compost accelerator, also known as a compost starter or activator, is an additive designed to kickstart and speed up the natural decomposition process. These products typically contain a concentrated blend of beneficial microorganisms (bacteria and fungi), along with nitrogen and other energy sources. By introducing a massive army of these "good microbes" into your pile, you can significantly shorten the time it takes to get finished, usable compost.

While a well-balanced compost pile with the right mix of green and brown materials will decompose on its own, an accelerator can be particularly useful in several situations. They are great for reviving a slow or "stuck" pile, especially one that has too many carbon-rich brown materials like dry leaves or wood chips. They also help to quickly raise the internal temperature of the pile, which is essential for hot composting and killing off weed seeds and potential pathogens. Furthermore, many starters contain ingredients that help to control and reduce odors.

When choosing an accelerator, consider its form (powder, granular, or liquid) and its ingredients. For those practicing organic gardening, look for products that are OMRI (Organic Materials Review Institute) listed to ensure they are free from synthetic chemicals. From easy-to-use soluble packets to nutrient-rich granular formulas, adding a starter to your routine is a simple way to guarantee a faster and more successful composting experience.