Pre Flowers
My plants are 39 days old right now, I dont change light to 12 on 12 yet and few of plants start flowering. They are full sezon plants. They have some cal mag deficit - is it a reason why they start to flower to fast ??
Can i do something to stop flowering ??
Those preflowers are normal, nothing to be worried about and they are just showing the maturity of the plant. They also start to appear between weeks 4 to 6 and some might develop calyxes which seems to be the case with the photo you shared. Once again, that is normal and it's only showing you have a girl ;)