The seed heads need to dry crisp before threshing, so I let these sit outside in the shade for a couple of weeks.
After the seeds were very dry, I just rubbed the seed heads between my palms so that the seed itself was separated from the surrounding seed head. The process was quite easy. Then I sifted this mess several times through a regular colander until most of the debris was gone.
Last few sifts involved a fan (do this outside!) to sift the seeds at a height of approximately twelve inches from the lower bowl so that the light-weight debris can be blown away and the heavier seeds remain.
And here is the final product! These flax seeds certainly do not look as clean as when you buy them in the store, but they are certainly useful and very nice.
All in all, my yield was about 1:20. I seeded two tablespoons of the flax seeds and harvested almost a quarter a pound. This venture is certainly worth trying, and I plan to seed these (now free seeds) in October or when it gets cooler, to harvest in the following Spring.
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