Organic cotton is grown without the use of chemical sprays using natural laws. Natural biodiversity, crop rotation and compost fertilization keep the soil healthy and full of nutrients. Instead of chemicals, weeds are prevented by simple skinning and hoeing, mulching, more efficient irrigation, growing more species of plants together. Natural insecticides are used and various practices (eg planting of certain crops) promote the occurrence of natural enemies of pests. Flowers are often harvested by hand or in a more gentle way and without the use of chemicals to defoliate plants.