Successful cultivation of cotton requires a long growing season, plenty of sunshine and water during the period of growth, and dry weather during harvest. It is cultivated in countries with hot climate as India, China, Egypt, USA, Afghanistan, Pakistan, Uzbekistan etc.
In India, cotton is cultivated in the states of Punjab, Haryana, Rajasthan, Maharashtra, Gujarat, Madhya Pradesh, Andhra Pradesh, Tamil Nadu and Karnataka. Cotton is sown around May & June and harvested around Sept to Dec in different parts of the country.
A number of methods, chemical and mechanical, have been used to control weeds and grass, including intensive spraying of herbicide before and after planting. The cultivator, rotary hoe, and flame cultivator are also used to destroy weeds.