My luffa harvest is just beginning to come in and I wanted to save some of the seeds for next year. My question is, why are the seeds that come out of my harvested luffas white, while the ones I planted were black? Is it that the luffas are too young? Or that the seeds I planted were treated somehow (they were from R.H. Shumway). Should I be concerned about saving the seeds?

Thanks in advance!