Introduction

• Walnut is believed to be originated from Northern West Himalayan region from Iran to karnali zone of Nepal at an altitude of 1200 to 2500m above sea level.
• In hilly region of Karnali region of Nepal, thin hard shell to thick hard shell wild walnut trees is found abundantly.
• Improved varieties of walnut are believed to be brought as English & Persian cultivar having thin hard covering Dante walnut 4 decades before and distributed all over Nepal.
• The far-western region of Nepal is more popular for walnut cultivation.