the word scrog means: screen of green.
and that is where U get a screen of eather chicken wire or some kind of screen with big enough holes in it to fit the plants growth through the holes.

and U can eather grow in soil or hydro and use the screen of green method both indoors and outdoors.

and 1 other very cool thing about SCROG it that all your buds will most likely be the same size by the time of harvest.

and if U do it right it should look like this. these pix I found on yahoo.com
under images.
pic#1:these 2 plants R still young kind of.
pic#2:now there a some months old.
pic#3: this pic a side view of the last pic. it show how short your plant can be.

and not all screen of green plants have to be that big. just look at mine. the link is in my sig.
mine is only 1 foot wide by1 foot long and only 3 inches above the soil.
she is very STEALTH.

I hope this answered UR question about what SCROG it.

HC.:thumbsup: