Ive never heard of just OG, But looked it up...didn't find anything except OG#18. It should cool to see how it grows & smokes. Im starting week 1 today with some OG Kush.. Im really exited. I have mom's & cloned them & been vegging them for weeks, They look beautiful. Hey if you flower yours...keep me posted. Like to know how it goes,etc. Peace & happy growing.