harvesting cannabis

Hi! I planted these autoflowers from barney seeds ( 10 seeds random mix ), on the 1st of February, each picture is a different plant. My question is when should I harvest them? I feel like the one has more dense buds already and I will probably harvest it sooner than the other 2 but I don't know...

Well, the time to turn it on again is close. I will be taking a small break/vacation the next couple of days and when I return it will be time. I have been sitting on and acquiring more seeds lately and I so desire to taste them I cannot wait any longer. I will germinate with the Germinator I...