Hey all, I'm wondering if it's a N deficiency I've got. They're not autoflowers, they're a photoperiod bubblicious. Into flowering, and a micro-grow inside a pc box. There was a period of temperature fluxuations before, due to random mid-april below-freezing cold snap, but that was a while back.






As you can see, it's been trained and stuff, just so I could get the most out of my limited space, and apart from a nagging feeling that the temperature might be dipping at night, it seems to have been going fine, bar the discolouration of old leaves. I was just wanting expert opinions before I add some ammonium nitrate to the next watering, rather than my usual 5-5-10 fert. It's under a red CFL 12/12.
Thanks!
EDIT: I'm fairly sure it's not a pH problem, since I do always make sure my water (tap water left out for 24 hours, then left on top of the grow box to warm up to the temperature of the grow so as not to shock the plant) is pH-ed to 6.6ish. +/- 0.1 at the most.






As you can see, it's been trained and stuff, just so I could get the most out of my limited space, and apart from a nagging feeling that the temperature might be dipping at night, it seems to have been going fine, bar the discolouration of old leaves. I was just wanting expert opinions before I add some ammonium nitrate to the next watering, rather than my usual 5-5-10 fert. It's under a red CFL 12/12.
Thanks!
EDIT: I'm fairly sure it's not a pH problem, since I do always make sure my water (tap water left out for 24 hours, then left on top of the grow box to warm up to the temperature of the grow so as not to shock the plant) is pH-ed to 6.6ish. +/- 0.1 at the most.