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Correct, every other watering, 50%. I have learned my lesson from this grow about how little nutrients are actually needed, and usually not even needed the first month. Investing in a good PH and EC meter for the next grow.

I removed the affected leaves for fear of septoria... think im gonna flush it like you were suggesting, possibly acidify it a little with white vinegar and see what happens.

Runoff PH is 7.0 not sure about E.C though

No but runoff PH is 7.0

Looks like leaf septoria to me, my PH's of run off and water are all between 6.5 and 7.0.

Yeh it looks REALLY similar to that... Dammit.

Dont think its leaf septoria?

Humidity is between 38 and 40%. PH of the runoff was 7.0

Here it is. Seems like it might be Ca lockout due to higher (7.0) PH? https://www.thcfarmer.com/threads/calcium-deficiency-leaf-septoria-help-flowering-stage.112450/

Will the fact that my nutes dont add additional Ca be an issue? Also, good idea to remove affected leaves?

Those are some AMAZING looking plants man. How did you get the buds looking so uniform, dense, and perfect? I harvested the plant in this thread a week after I posted it because brown spots vigorously started appearing and I got scared (first grow). In hindsight, way too early. Would you mind...

For sure. So what do you recommend? Acidifying the water next time down to like 6.2-6.5? Also the nutrients I am using dont say they have Calcium in them. Mg, B, Cu, Fe, Mn, Zn but no Ca Can I use 1M HCl to acidify? Im a chemist and have dilute HCl from my lab and figured just titrate the...

So what do you recommend? Acidifying the water next time down to like 6.2-6.5?

This is what I was thinking... I water till runoff yeh. I have not checked ppm or E.C... I dont have the means to do so. Im gonna invest in a good PH probe for this I think. The strips suck. The other plant was treated the same way, and started developing the same spots but was further along...

Worried about this plant... will this ruin the harvest? Its 4 feet tall now. Should I remove the affected leaves?

Hi everyone, I have these brown spots appearing for about the last two weeks. Plants are 9 weeks old and are flowering now. Another plant i started at the same time was harvested, and I saw the same thing happening to that plant so I harvested it about a week or two early out of fear. Is this...

Thanks for the replies everyone, really appreciate it.

Gotcha. Kinda surprising, i thought theres no way its nut burn because i have not given any for maybe 7 or 8 days and flushed it with water. A few weeks?? Wow. https://www.growerschoiceseeds.com/shop/cannabis-seeds/northern-lights-auto-flowering-feminized-cannabis-seeds/ Those are the...

Hey everyone. Wondering what peoples opinion is on my plants! First time grower. Northern Lights Autoflowering Fem. Seeds. Been growing for exactly 8 weeks. They have gotten some red hairs, and are covered in crystals. I do not have a trichome lense unfortunately. Cut off a small sample to...