can I put seedlings ditectly into lava rock?

I can't get any rockwool where I live!!
I have a small DWC hydro system with CFL's. I will be using lavarock as the medium but I want a buffer between the seedling and the nasty rock. ANY IDEAS??? thanks

so basically you want to place the plant (and roots) within something to shield it from coming in contact with the lava rocks?

I would use rapid rooter or jiffy pots from your local lowes or home depot or kmart or walmart and then place that into your lava rocks with a clear plastic cup over it until you get some head. Lol. Lol. Lol. Seriously.

CG on lava rock. It is actually the most prefered medium for roots if not the safest as any jogging with DWC in hand will surley slice the roots with those sharp edges. I read a study that was legit and schoolish where lava was the big winner.

i throw tomatoes right into the lava rock and it works fine.