I went to ikebana this weekend

I went to ikebana with my friends this weekend . But We used waste materials of flowers at the place.
The bricks from the construction field, The pellet plants from tall trees and the grass on both sides of the road, The flowers was bought by us only. We only brought the flowers with us. My teacher told us before that we should change wastes into valuable materials to give them a second life(My teacher told us before) .
My friend suggested we should get flowers from the wilderness and from near the roads or even pick them up from a flower shop 's trash can.
So my language mate you should try it too. It is not hard . Just to fancy and look for something waste materials !
This is my works