Sep, Oct, Nov
Knot one end of the cord back onto itself to make a sliding noose. Then tie the other end onto a strong hook or wooden beam.
Wind the tops of three or four onions through the noose to create a 'pendulum' at the bottom of the cord.
Wrap the tops of each of the remaining onions around the cord, then slide them down onto the pendulum. As the onions stack up, their weight tightens the noose at the bottom and pinches the onions in place.