Organic flax seeds planted in my garden turned to lovely flax flower plants. I was surprised that they grew, because I bought the seeds in the food section.
When they were ready I cut and tied them and hung them in bunches in my shed to dry. They like a dark, dry place.
I used a 14" wire frame that I bought at a yard sale. You can find them at your local craft store.
As you start putting small bunches around the metal form, attach them securely with green floral wire.
Follow the same direction all the way around, adding wire as you go.
It will last for year if you keep it out of the hot sun and in a dry room (not the bathroom). There are preservation sprays you can use, but I don't like chemicals so I leave mine as natural as possible.
If the need arises and you want to make a new one many years down the road,just remove the old flax and wire and start anew.