Final cleaning to remove debris
Once seeds have been released, a final round of cleaning may be required to remove any debris - frass (insect droppings), leaves, twigs, dust etc - that will reduce the quality of the collection. Two simple ways this can be done include separating seeds by their size through a series of sieves, or by weight, in which case seeds are passed through an air current that 'blows' away the rubbish, allowing the heavier seeds to drop into a collection container. Larger debris may also be removed by hand.
Once the collection contains pure seeds, it’s time to package the seeds up ready for transport or storage. However, if we don't know the best way to store the seeds, then this is the time to start testing.