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Good thing about them is that they don't care about photoperiod. 24/0 will give you faster growth and larger yield, but you can change it any moment and nothing's gonna happen!

My tent is weird right now, cause these 2 autos are on 18/6 together with 4 photos, which are vegging, but it's no problem at all. My LED fires veg range and that's it :)

One legit thing I heard is that you should put them in big pot straight away, so they're not stunted. But I think you're growing hydro :)