Your plants are now 1'-3' tall and you must set the timer to 12/12. (12 hours on and 12 hours off) Upon setting your timer to 12/12 your plants will begin to flower. They will begin to show either male pollen sacs or female buds. The males you will want to pull out immediately and throw them out or make hash or hash oil out of them. Once they are pulled the flowering stage has begun. This is the stage in which your female plants begin to produce buds. (which we all know and love the female cannabis seeds) Your flowering stage will vary depending on the strain of marijuana you are growing. It can be anywhere from 39-100 days long. Most strains average at about 50 days.Fertilizing