I am currently at week 5 from seed. Plants range from 6-9". Starting to get secondary leaves/branching off of leaves from main stem. Lighting at 18/6 using Fox Farm nutes. Planning to flower starting 1st week of January. When can I sex my plants? After I start flower light cycle? When should I take clones? Any/All advice highly appreciated. Here are a couple pictures showing you all where I am at currently. By the way, these are Blue Mystic from seed.