Low Mg??

[Bobbo]

Hello. Novice grower Bobbo here. Can anyone please assist me with this diagnosis. I’m thinking low Mg. Anomaly started on the bottom, then ascended. LED lighting. 20 inches from top. 300 watts. Organic soil. Thank you. Happy Holidays.

[echdk3]

Hi Bobbo. What’s your pH situation? What pH have you been feeding, and what is the runoff pH?

[echdk3]

My bad, I missed you’re using organic. Sorry!

I’ve never grown in organic but have you studied up on this article?

https://www.growweedeasy.com/adjust-ph-organic-marijuana

[Xena]

My soil is organic. Organic doesn’t necessarily mean living soil....I got into PH trouble last time.

[Bobbo]

Hi thanks. The PH run off is 6.5. 7.0 on feeding. So low Mg is feasible. The burnt tips confuse me. That’s too much light usually no?

[9fingerleafs]

I think its a pottasium deficiency

[Rwise]

Looks like a root/PH issue from here, whats the soil PH?

[Bobbo]

Hi Rwise. 6.5 using my ph/h2o/light meter. Thanks

[9fingerleafs]

Those things don’t work