Just ordered some BlackJack myself right before they sold out,(still waiting on them)...Supposedly this strain is done indoors between 61 and 65 days...Might be a little less,might be a little more...Six plants from seed are not going to be exactly alike...Best for you to get a scope and don't start weighing your buds before you even harvest,lol...I'm not familiar with your nutes,but if they're not organic,I'd start flushing soon if you think the grows about done...:stoned:

Sorry man,gotta edit...IF YOUR AT 4TH WEEK FLOWERED WITH BLACKJACK YOU'RE NOT DONE!!!
DTRave420 Reviewed by DTRave420 on . into week 4 flowering i have 6 female black jack, i vegged under 4 55w flo's, and flowering under a 400w hps. i have an airtight setup in the basement with extracter fans carbon fiter and floor fans. i used terra vega nutrients in veg, and terra flores for flowering. all my ladies look really good, and smell delicious!!! but i was hoping for about 2 oz a plant???? but as i only have another 2 weeks left (i think) i dont know how much more budding they will do, i was hoping they would look thicker by now. im kinda Rating: 5