Hello new grower and new to the community. I am wondering if it's time to switch my plants to flower cycle. I am growing in Happy Frog and Peat Moss with perlite mixed in. I planted them back mid-April and they are approximately 15-18 inches tall. growing inside a 6x6 tent under LED. I'm not sure if it's time to switch or not it's been 2 months any help would be appreciated