phototype strain started flowering on 20/4 light cycle ?

[Prince_Fajita 32]

4X4 grow tent
soil - 16l pots

4 blue cheese

1 royal ak

1 pineapple chunk

watered every 2-3 days

fed every 3rd watering with old timers grow.
5 weeks into veg from seed

this is my first proper grow last one was a mesely 2 plants i got a half oz off. the light cycle is on 20/4. i took cuttings today from one blue cheese because i though it looked monster, before i swapped to flower in 2 weeks time. after i examined the cut i realised there were little hairs coming out the stems and clicked it had gone into flower (i wondered why it got greedy and stretched 5-6 inches) and i have no clue why ?

may have possibly mixed up nutes on a feeding and gave it a shot of bloom but that wouldnt have affected it surely? im just gonna flip the tent to 12/12 and get em all under way but anyone got an idea as to why this has happened ? i dont want it happening again because i could of done with the extra week or 2 of veg. 

any help would be appreciated.
 

Edited February 9, 2018 by Prince_Fajita

[nl5 8,806]

There preflowers mate, they stay like that don’t go into full flower

[Prince_Fajita 32]

5 minutes ago, nl5 said:

There preflowers mate, they stay like that don’t go into full flower

oooooohhh cheers buddy my last plants were bag seeds that hit 4 weeks veg and literally had nothing too them. Thought that only happens when you send em into flower. Will keep em on a bit longer then !

[Slugums 4,117]

Mature plants show their sex prior to flowering, so all good and, the bonus, you know you have girlies!