im glad you've enjoyed the read and will be sticking around until the end! the autos are looking good.. but its flowering these long vegged girls im most excited about..
as far as your situation, or any grower for that matter, 1 gram per watt of power used is about the ideal harvest amount... i've seen a grow that got over 2 grams per watt... so its more than possible.. its just that 1, things never go as planned in the beginning.. 2, if its your first grow then take this grow as a learning experience (focus on everything except the final yield so that you can really learn about the plant and its needs ect.ect).. and 3, strain/genetics play a big part in it too.. some strains are naturally smaller yielders.. while some yield more than what you'd think... and if the genetics are good then the outcome will be better all around.. if they are poor genetics, everything will suffer....
