Sep, Oct, Nov, Mar, Apr, May
When the seedheads have developed fully, remove them from the plant and lay them on a sheet of paper indoors, to dry for a few days. Once dry, separate the seeds from the seedhead. Place the seeds in a clean, labelled envelope.
Place a sachet of silica gel in the container to prevent any moisture developing, and add the envelope of seeds. Seal the container and store it in a cool, dry place such as the fridge.