I bought 2 packets of seeds from Special plants today at the Chenies Plant Fair. Between them they had 5 green seed and 5/6 shrivelled seed. I have sown them separately (green in 1 pot, others in another) in deep pots and put them in shade on the north side of the house. It was 24C today so not so cool but we will see what happens.
I have grown this plant before, many years ago, in chimney pots if I recall correctly, and kept it for several years but never started from seed. I may plunge these pots inside larger deep 3 litre pots before winter. See later.