Climate

• Warm humid tropical climate
• Annual rainfall : 75-150 cm
• Temperature - 22ºC
• Altitude - 1500-1800 m
• Being a photosensitive crop sunny days and cool nights are favourable for better tuber development.

Soil

• Grown on a variety of soils
• Requires soil with good drainage.
• Grows best in fertile sandy loam soils.
• Heavy clayey and very light sandy soils are not suitable for proper tuber development.

Season

• Rainfed crops: June-July, September- October
• Irrigated crops: October-November (for uplands)
         : January-February (for low lands)