Ive got a four way special (high quality seeds) that is about 4 weeks into flower under a 400w HPS. I no my temps arn't that great at night they drop down to bout 16c maybe 15c (Dads nicked my heater for the conservatory)!! So i was thinkin that it was a nute lockout or somet??
The leaves have gone pale green then yellowish and the sides have curled and gone crispy.
Anyone any ideas....
cheerz fray

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