Irrigate immediately after planting and give a life irrigation after 4 days. Then irrigate once a week in garden lands and once in 10–15 days in wetlands, and irrigate copiously after every manuring. With drip: 15 litres per plant per day up to the 4th month, 20 litres from the 5th month to shooting, and 25 litres from shooting until 15 days before harvest.