The following info might also be helpful:

The first day of Dashai is known as Ghatasthapana. On this day, a holy water vessel representing Durga is established and oat seed is sown for its seedlings to be used as “Jamara” on the 10th day.

Source:

Page 24 (Section “Dashain”) of: http://www.asia.msu.edu/nepal/Nepal%20Study%20Guide/Understanding_Nepal_development.pdf