another 4 MINIMUM, those pics may just be a bad angle to judge but by the looks of them you're hardly even 4weeks into flower yet, most strains average about 10 weeks of flower time, some are done in as little as 8week, some take up to 14weeks, as cannabis.queen said its best to go by color of trichs, hairs, and swolleness of the buds, worst thing you can do is chop too early because of impatience and end up with a much smaller much less potent harvest than you wouldve had. Id suggest taking more pics from more of a side-veiw angle, could give a better indication of how far along you are, but those buds look way young.Damn another 4 aye I didn't think it would be that much longer
did you trim off the fan leaves of your plants? is this a thing people do during flower?