WINNOWING is the fabulous process of separating the seeds from their casings and spent petals known as ‘chaff’. Put the seed-heads in a bowl and scrunch-up between your fingers to pop the kernels from the cases. Then standing outside with the wind at your back, gently toss the contents into the air, gently blowing across the bowl at the same time. Because seeds are heavier than the chaff, they fall back into the bowl while all the stems, petals and unwanted greenery blows away. Pour the seed back into a labelled envelope and keep in drawer for sowing in spring.
To separate seeds from their cases, try winnowing