HELP ?? BUDDING IN AUGUST?? WHEN TO HARVEST??

HERE ARE A FEW PICS OF THE PLANTS THAT I HAVE NOW. I KNOW THEY ARENT VERY CLEAR, BUT HOPEFULLY YOU CAN SEE THE SMALL BEGINNINGS OF A FEW BUDS. THESES PLANTS ARE APPROX. 3 - 4 MONTHS OLD. IS THIS NORMAL OR ARE THEY STARTING OUT SLOW??? AND WHEN DO I START HARVESTING???