harvest when the crystals on your plants turn cloudy and darken. That 1 kilo us per meter squared, m2. If you looking for lots of buds with a normal high then go with big bud. If you arent dealing I wouldnt grow big bud. Grow something better, white widow, white rhino, snow white, purple haze, turtle power, strawberry cough, blueberry, bubble gum, bubbleberry, c-99, ak-47, juicy fruit, nebula, even normal chronic can be great if grown right. There are many good strains out there. Well if your growing outdoors you might get 5 pounds with anywhere from 2-20 plants, there are too many variables. Be more specific, what is the climate, why are you growing, do you only care about yield or is buzz a factor?