I have never heard of such seeds...
You can grow them in soil..
I may be wrong.. but here it goes.
There is this perception amongst non growers BUT heavy smokers that there is a weed called "HYDRO"... or the "DRO" and it is this "killer california indoor hydro shit BRO"
well that has turned into an urban legend .. and now people think that HYDRO is a kind of special weed that can only grow hydroponically... but there is no such thing..
Nobody knows anything... and most people talk out of their ass... there brain has thoughts and they just let them slip off their tounge.. like it is some reality... LOL
iloveyou