Cordyline Seeds

I would like to grow some Cordylines from seeds produced by one of my plants. Most of the seeds have now turned a light green, but when i break open the seeds its full of white stuff with one or 2 seeds inside. What should i do, cut the spike off and dry, leave on, take seeds now and plant in a greenhouse?, so many questions :confused: .
Any help appreciated.

 

When i grew mine I just took the seeds off put them in an envelope till april then planted in little pots, some sprouted a few weeks later some didn't, its a bit hit and miss.

 

Thanks TO, then thats what i shall try.