>>1540914Here it more or less shows the general idea. Let it grow and when still green cut it down to fertilize the soil. The roots are left so while decomposing they will leave space for the roots of your own plants. They are also supposed to kill harmful nematodes in the ground and all that stuff. It's one of the "bio" label methods. There are different types for different seasons, but i think wherever you live there should be something similar.