Question

Why does willy keep planting seeds where they've never grown before? why does willy think biff will be impressed with his funeral? why does ben say that biff will call willy a fool? in hope that they grow; so many people bc hes well liked; cause hes gonna know you killed yourself ?

Answer 1

He trusts and hopes that they will develop and grow; Willy figures Biff will be inspired in light of the fact that there will be many individuals since he is very much loved; says this since Biff will realize that Willy murdered himself. 
Death of a Salesman is a 1949 play which was composed by American writer Arthur Miller. It was the beneficiary of the 1949 Pulitzer Prize for Drama and Tony Award for Best Play.Death of a Salesman tends to loss of character and a man's powerlessness to acknowledge change inside himself and society. The play is a montage of recollections, dreams, showdowns, and contentions, all of which make up the last 24 hours of Willy Loman's life.

Answer 2

Willy keeps planting seeds where they've never grown before because he doesn't know much about gardening. He does think Biff will be impressed with his funeral. Ben says that Biff will call Willy a fool because he plants seeds where none have grown before.