yes they appear to be preflowers, pic 1and 3 of the second set and pic 4 of the first set i think shows them. they probably showed earlier but just on one set of nodes, if they are everywhere i would guess that they are starting to flower right now. i usually refrain from guessing at these because of my inexpierience and also when trying to guess on my own preflowers i was wrong on a few of them but i still say yes. there are other considerations when growing outside other than just 12/12 plants seem to know when to do their thing even if it isnt exactly 12/12 yet. the color of the sunlight, temps.