All five seeds sprouted. I guess whether they float or not is irrelevant. I put them in 2 gallon pots in Happy Frog media in an auxiliary location under a 1000 watt HPS just because that's what I have. In a couple of days I'll receive an Optic LED Optic 2 GEN4 200W Dimmable COB LED Grow Light and will add that to the mix.