 It interacts with the soil and fertilizes the roots. Actually, the soil around that plant, it activates the soil. It actually attracts worms. It brings in all the activity where plants kind of go, whoa, this ground's alive. My goodness, this looks like a good place to grow. I think I'll root out more. Any plant that has been stressed, had some leaf tatter, had some mildew, some leaf spot, bugs, whatever, any kind of stress,