Various studies have concluded that gardening reduces stress and calms nerves. It substantially decreases cortisol, which is the hormone directly related to stress response. As humans, and especially students, we have a limited attention span. Students can often become irritable, distractible and stressed out. The rhythms of the natural environment and the repetitive, soothing nature of many gardening tasks are all sources of effortless attention, and give students the break they need from their usual learning environment.