What’s going on.

[Acoustic57]

I’m just getting into week 5 and iv’e got bottom fan leaves turning yellow. Practically happened over night. Am I not watering enough or a nutrient issue. I’ve been using grow big during veg state then switched to tiger bloom and big bloom. I’ll include some pics.

 

[Garage_Grower]

Looks like ya got some nitrogen toxicity going on, with those dark clawed leaves.

 

[Waira]

@Acoustic57 ...yes, the tip claw is N tox,.. question is, when did that occur? The current symptoms on the lowers does look like N defc., fans getting tapped... this is normal during bloom, but not this early or to this extent....
Tiger is your base bloom, note the NPK#'s vs. the BB... those are in the decimals! BB is more of a supplement IMO; good stuff, use at full doseage....

 

[Acoustic57]

Thanks for your reply. I’m a first time indoor grower and things were going good till the beginning of week 5. I think I was under watering them when I did add my grow big and big bloom I followed the label instructions but did not take into consideration What I was growing. Live and learn