Quote Originally Posted by pipefitter
Is it wise to wait for alternating nodes as a sign to flower or is a 16inch tall and healthy plant a good enough reason?
The alt/nodes is a sign of sexual maturity. If you flip before the plant is sexually mature, she won't go into flower right away. She'll continue to veg until maturity, under the 12/12 schedule.

At that size, they must be pretty close. Blueberry, right?