Thank you, David, for that information. Before I received your reply I'd put a few kernels in seed raising mix and kept it moist but several kernels have gone mouldy, I then took several more kernels and broke them open, extracted the seed, and have now sown them in damp seed raising mix. Maybe they are too old, but time will tell if they germinate, If not, next year I'll gather the seed earlier.
Regards,
Dorothy