i can only give my plant 400ppfd of light(bloom 5.weeks)

LeastExpectedGrower

Well-Known Member
Those plants certainly don't look like they have a nitrogen deficiency. 17C seems a bit low for your lowest...consider trying to bring that up to ~70's. This is something that's been happening to you in that first few weeks of flower stage? I'd look at what you're feeding in terms of P/K. More light asks for more feed as the plant utilizes that energy.
 
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