Short answer---some float for a long time, some float for a short time. IMHO, no discernible difference can be gathered simply by float or sink.

But, can ya give us a little more info? I would assume your talking about having them in water as a first step to germination? If so, I don't believe you can tell much by that ideology. Here's why I say that: The only reason something floats or sinks in water, is because of that object's specific gravity, or it's water displacement(think boat here). So, if a seed is given enough time to absorb a little water, it's no longer displacing much, but instead it's absorbing it. So we can throw that variable out(for our purposes anyway). Now, a certain strains' seeds, all being "slightly" different genetically, will, in all likelihood, also have a different specific gravity in water. Hence, my belief of why some float and some sink---specific gravity variance.

SOMEBODY STOP ME!!!!!!!!!!!! lol--- Sorry man, sometimes go off on a tangent like that and type waaay too much info:wtf:.