I sow them all since Adenium seeds seem to not germinate well over time. Also, most of the times, the flower you get will be pink or white. The more you sow the better chance to get the flower you like.

I agree with Shang. You need to store the seed at just the right humidity level (around 6 to 8%) in order for the seed to stay viable over a long period. So it's probably better to just start them all and weed out whatever you don't love. Most of them will probably be discards so why wait? Get'm going and then you'll have plenty to cull out to give to friends, family, or trade, sell, compost, whatever. Or use as root stocks to graft back onto!

Hi Bragg, I would love to help sprouting your left over seeds if you'd like.