3 weeks into flower. What’s on my fan leaves? Thank you! (Pics)

Temps 70-79
Humidity 40%

Hmm, can you do pics with the lights off and just flash? Kinda hard to tell. Probably need more info too, like strain, feeding, ph, soil, etc... But just guessing it looks like it could be from over watering...

Looks to me it’s a Cal mag deficiency !!!

Dankrolledfreshed said:

Looks to me it’s a Cal mag deficiency !!!

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Agree - but could also be caused by overwatering maybe right? Or nute lockout too... Need more info...

hawse said:

Agree - but could also be caused by overwatering maybe right? Or nute lockout too... Need more info...

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Absolutely right Need more info!!!

Starting to think it’s phosphorus deficiency.

Dankrolledfreshed said:

Looks to me it’s a Cal mag deficiency !!!

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was just about to say the same thing. had this problem a few years ago with rust spots. calmag or Epsom salts is what you need.

Thrips or fungus gnats. If you see bugs around.

Dankrolledfreshed said:

Looks to me it’s a Cal mag deficiency !!!

Click to expand...

No such thing as a cal mag deficiency...but a calcium deficiency may be an issue here

Wantthatbud said:

Temps 70-79
Humidity 40%

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Spots start from lower leaves up? Any purpling that shouldn’t be there in stems or leaf petioles/veins.

Thank you to everyone!

2 things were happening.
-my Ph meter calibration was off causing all types of deficiencies in some categories and excess of nutrients in other categories.
-lots of build up in the soil.

I flushed 5 gallons ph’d water in each plant.

Plants are bouncing back, there has been no further discoloration and they are standing tall.

Thanks again.

looks like you are overfeeding by the brown tips,its hard to tell by the pics