flowering

As early as you would like
What he said. Unless it's an auto-flower seed, it won't start budding until you switch lights to 12/12. I put a mid-grade seed in some soil a few weeks ago, and about a week after it rooted and started veg, sure enough, flowers started showing as well. It's going to be one tiny ass plant, but goes to show you can start it whenever. Sometimes it might take a little bit longer for the plant to reach sexual maturity, but it still shouldn't take very long.
 
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