One good size plant can give hundreds of cuttings. I have a tiny ass LST'd plant and took 4 cuttings easy, and they all rooted. Could have easily taken 16-20 cuttings, just didn't need that much. But I guess it all depends on how big of cuttings you're talking. I'd say it would be pretty easy to take 16 decent sized cuttings from a 2 foot mother; could possibly get it out of an 18 incher, just depends how much growth you got.