preflowers show up on their own , it really can depend on simply the age of the plant.. a 2 week old sprout won't exactly show preflowers if you cut out the N and add more P and K but keep the light cycle at 18/6

Are you implying that you want to show preflowers.. so that you can determine the sex without putting it into flowering?
BobBong Reviewed by BobBong on . Drop the N to show preflowers? is there any way i can help the plant show preflowers? Will too much N hasin preflower development? Rating: 5