hey there brother!
your ladies are looking just wonderful my man! very very healthy, not one sign of deficiency or burn- GREAT job!
if you are concerned you can always do a fresh water flush for a transition to flowering nutrients... or you can just start to feed straight without a flush- it shouldnt hurt your ladies one bit either way.. more a matter of.... efficiency?? the plants will take up nutrient from your soil medium, obviously, so as you begin to add flowering nute they will adapt to the differences in the elements within your nutrients and respond accordingly- doing aflush will just help leech excess N(among other things) from your soil and start with a 'blank canvas' so to speak... to a degree that is
what you COULD do- to test for yourself.. is flush 1-2 plants and start flowering nutes and not flush the others... see if there is a discernible difference in response and growth etc.. experience is the best teacher ;]
i'd be interested if you see much in the way of 'flower stretch' too.. as you enter into a flowering light cycle.. if you do it will probably last 2-4 weeks, after which time you should begin to see the stretch slow a bit and the buds start to fill out into lovely looking ladies- voluptuous and full figured- like any beauty should look loL
im subbed mate and look forward to seeing these beauts bloom and fatten up
go hard brother! reps+++