I don’t know what deficiency this is, or how to fix it

Hi so most of my plants are healthy, with a little bit of nute burn, but my Romulan started to look yellower and yellower, and also started getting pink/purple tips. The yellowing starts at the top, although a couple weeks ago the deficiency started showing from the bottom. I checked root zone ph and it was at 6.9. I added sulfur to bring down the ph. Here are some photos. The Romulan is the yellowest plant.

I would feed some CalMag. After Googling images for "Cannabis magnesium deficiency."

Looks grossly short on Mg.....be sure your pH is where it's supposed to be before adding anything, otherwise, you'll just end up chasing your tail. Good luck.

What's in the pots mate, soil or coco?

EvilScotsm@n said:

What's in the pots mate, soil or coco?

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Soil!

marsuzano99 said:

Soil!

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Ah sorry bud I only know coco/hydro. Thought with the size of them they would be. Nicely done mate, shame about the deficits but they're a healthy size.
Sure someone be able to sort you out soon enough. I'll give you a bump back upto the top.

Very interesting to look at your pictures and compare to the plants.

If they all in same soil and sharing same nutes do not see how this can be a deficiency. Anyone can step in here and correct me. All of them appear to be showing varying signs of excess. Looks that way when I zoom in on the two greener plants in picture number 4.

What food is in your soil mix, and what nutrients are in your water?

It looks like zinc def from pictures. Check this out. If it's zinc water with 6.0 pH and watch out not to overwatering this plant

end_of_the_tunnel said:

Very interesting to look at your pictures and compare to the plants.

If they all in same soil and sharing same nutes do not see how this can be a deficiency. Anyone can step in here and correct me. All of them appear to be showing varying signs of excess. Looks that way when I zoom in on the two greener plants in picture number 4.

What food is in your soil mix, and what nutrients are in your water?

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Fox farms nute line fed at quarter to half strength. Yes, they are all fed the same nutes.