How long does it take for a grass clippings to decompose?

Grass clippings typically decompose within a few weeks to a couple of months, depending on various factors such as moisture, temperature, and the size of the clippings. In ideal conditions—warm, moist environments with adequate air circulation—they break down more quickly. If left in thick layers, decomposition can take longer due to reduced airflow and moisture retention. Regularly turning the clippings or mixing them with other compost materials can speed up the process.