it is very possible with the right equiptment to produce enough to chew. coca grows at about .8 inches a month until they reach maturity, in which case they grow about .8 inches a day. but as for the production of cocaine it isnt really worth it
i left for the weekend one time and my plants stretched 3 inches. i got a fan next to them and brought the light really close and they are doing great now just read up a little on stretching