thanks for advise, i dont mix fert at the recomended dose anyway i use enough to make a litre and make a litre and a half with it, i topped the 3 biggest plants yesterday as i am limited by space. they are about 16" high any idea what kind of yeild i will get at that size (if there not all male fingers crossed) havent smoked and weed in 2 weeks now would be nice if i had something off them for xmas but think it will be new year before there ready