This book compiles the latest research in the area of Trichoderma Rhizosphere Biology. It covers topics such as microbial interaction, crosstalk between plants and microbes, interactions with abiotic and biotic factors, and advances in biocontrol agents, biofertilizers and biostimulants. The respective chapters describe innovative ways of adapting fungal communities to improve their survival in highly dynamic environments and agroecosystems. In closing, the book discusses the use of Trichoderma as a bio-growth enhancer and biostimulant for organic agriculture.