Start by gathering flexible branches or vines
When using thinner materials like the thin ends of willow branches, form them into a rope by plaiting them together. Overlap the pieces and twist them together. Then wrap more tightly with slender pieces that form tight loops.
You may choose to tie the top using only the branches, or you can wrap first with wire, then cover the wire with a branch rope.
Then wrap individual thin branches to tie the rope to each of the poles.