Growing Loofa From Seeds

I'm growing loofas and I"m doing more experiments. I had 12 loofa seeds soaked overnight. Using my 12 compartment seed trays, I placed 6 seeds in the seed starter and the other 6 in a paper towel. The seed tray is outside in a makeshift greenhouse while the paper towel is in a plastic bag on a warm surface (the top of my cable box). We'll see an about a week or so which one is faster.