Composting improves the physical condition of soil and can thereby reduces the risk and impacts of climate variability and extreme weather events such as droughts, dry spells and heavy rains. Healthy soil systems can better respond to temperature increases, changing rainfall patterns, increase evapotranspiration rates, and alter pest and disease cycles. Composting improves soil quality by promoting soil aggregation and preventing surface crusting, which enhances water infiltration, plant root penetration and soil aeration. This also prevents surface run-off and erosion. It also conserves the nutrients contained in animal manure, sewage sludge, and similar materials. Furthermore, it supplies the plant growth hormones not found in inorganic fertilizers. It also increases the buffering capacity of soils and minimizes the adverse effects of soil acidity and alkalinity. These result in reduced farm input costs because less chemical fertilizer is needed. This practice describes rapid composting using Trichoderma as a location-specific and appropriate option for climate change adaptation in selected representative sites for low, middle and high elevation in the Philippines. It further explains the economic benefits of this method as well as its social and cultural acceptability by smallholders.