Is this Mg deficiency? Overwatering?

Hi all. First time grower, I appreciate any and all help you can provide.

Day 40 since flip and lower leaves are yellowing up. But they also have these brown / grey spots on them. Mg deficiency? Overwatering? Nothing to worry about ?

FFOF soil, Gaia Green Bloom nutrients, pH 6.4 water (runoff is 6.7)

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Seems like you may just need to feed a bit heavier. Looks like potassium deficiency

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Can you provide pics of the plant?

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This is from about 5 days ago, the big leaf on the larger plant in the back is the one in the first post. The plant is 35 days in the picture above.

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So are all the leaves turning like that or is is just that one and a few lowers?

The lower, large fan leaves. But it’s slowly starting over all of them on the back plant, and the plant in front is slowly turning lighter green.

They’re being fed tomorrow - was going to be 6T Gaia Green Bloom each, 1C Worm castings (they’re in 3 gallon plastic pots) and some soil for mixing - top dressed in and watered.

Was expecting this to be their last feeding, but now I’m not so sure.

EDITED TO CLARIFY NUTES

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This is an example of a leaf from the front, more sativa plant.

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Nitrogen deficiency on that leaf. They are just hungry.

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And what about this? hum|nullxnull

https://www.zamnesia.com/blog-cannabis-root-aphids-combat-them-n2268

To me it looks like they are hungry…with them progressing through flower they may just need more and when they can’t fund it they canabilize themselves. I would up the feed and see what they do.

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Root bound for sure what size pots are they in?

Definitely root bound. 3 Gallon pots, since before flower.

I would carefully cut the bottom off the pot and set it in/on a bigger pot with more medium but not a medium with a lot of nutrients like a super soil or water only soil since they usually are packed with nitrogen. I’ve done this before and it works as long as the medium is not supplemented too HOT, try just plain basic non supplemented bedding soil . Just give it more room for the roots should be fine

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Gaia bloom is pretty low in N, they tend to fade pretty hard by the end. Some leaves will drop off but the buds should be ok.

Lot of good info here check the posts from swedsteven. He runs half all purpose half bloom right to the end to keep them green.

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Yeah, I don’t know about that. Look at these.

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The back 3 are in 5 gallon fabric pots. All the rest are in 0.81 Gallon pots. These current ones are in the same 0,81 gallon pots.
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Yeah the pot size is fine.

Forgot to say… welcome to OG. That’s a great looking first grow!

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