I note that there have been a few threads about sowing from seed lately, and many have recommended getting fresh, ideally green seed.
For those who haven't yet harvested their own seed for swapping on here, maybe it's worth suggesting any good suppliers you know of? That have slip plied seed with a good percentage of germinator?
for my part, I've used Just Seed. I wouldn't say they've been 'green' but I've had some relatively fresh seed from them