Pattern doesn’t support a Ca or Mg issue
That is why I went with very basics first with mobile nutes. Wont stress the plants and gives a solid base for nutrient movement.
I hate jumping to hard changes before I can see where the basics take me.
Just a carefull and patient troubleshooter.
I see some hot but that is a pretty easy adjust if letem eat it and adjust new feed pattern.
Just my thoughts.
I flush only if required by nute line. Otherwise I water and starvem into clearing the medium.
I just saw the damage and thought nothing to worry about.
I don’t see signs of needing more. I wouldn’t adjust anything and risk imbalance from chasing non existent issues. You can’t take it back, and are often compounding issues. I’ll always look to new growth before making that assessment.
I agree. BUT, mag and calcium top dressed in wont hurt.
As I mentioned basics but I defer to others view always. Just what I use to start my troubleshoot.
We both grow organics, so you have to consider the salt side that uses calmag on the reg. Assuming balanced feedings and use of calmag plus water input Ca, I’m always hesitant to suggest messing with the unknown balance and causing locks. Those two affect so many different elements.
@Budbrother hey man take a peak at the leaves. They are showing solid discoloration between the veins. Stripes.
Kinda leans me to that mag over burned.
Tops look great. Showing stripes beginning on lower mature fans.
Still doesn’t look like Mg the way it’s coming in. Looks imo more like variegation in pattern. Mg comes in from the tips and works in towards veins. This is the reverse pattern seen. I still lean towards too hot and getting nutrient burns.
Good discussion. This is how its done. All minds heading to the same goal using different paths.
As organic growers, our top dress style takes longer for fixes at times but very seldom needed.
That’s not a yellow stripe like we’re used to. That’s burns. Agreed a lil Epson not gonna hurt, but I’m thinking maybe it is drying out too much and concentrating the nutrients. When watered again, the concentration buildup might be burning and it need a flush. Would need EC readings. Think we all just skipped that part.
I usually stay outta salt business but I have learned to switch gears and am able to consider a different systems inputs and interactions.
Possible. I never dry out anymore but when using liquids I have seen over concentration in the soil requiring a water only until smooths out and a moist always soil.
All in all the girl looks healthy. Top is green and fresh. A couple more days will give a better look after the adjustments suggested by everyone.
Yeah we don’t dry back fully ever or you’re loosing the heard and fn with the pH. Not to mention, we don’t ever water to runoff. Completely different.
NO!!! THE DREADED NUMBERS!!!
.
I had a brain overload and a sudden wash of fear
And this, my friend, is why I don’t mess with salt. I stick to simplified growing that eats little time and energy and requires lil thought. I’m holding on desperately to that last brain cell. 
Ahh man. We get each other.
Magnesium deficiency in cannabis causes interveinal chlorosis (yellowing between the green veins) on older, lower leaves first. As it worsens, it leads to rusty-brown spots, crispy leaf edges, upward curling, and potential red or purple stems
I do believe that you have an accurate description of the issue. Wednesday mag on a light note and nurse her till she produces. If she’s green she will come back. 
I concede after a joint\time break. In the rapid back and forth in the heat of that 250 edible hittin, gave me myopic vision, when the new pic came in, to the burns plus the spots pattern and locations and general lack of paleness
Obviously now to me that those lower burns must have been a separate issueI. Then seeing the spots, lack of yellow on older leaves first only and following the previous train of thought. I had totally looked past the updated data showing the general paleness growth starting up top. Mg does start on lowers, but when your pumping N it burns through Mg. I was visually stuck on a separate issue. You spotted this imbalance. High welcomed the debate, but I can admit when I am wrong. I tip my hat to you Storm.
That’s what I was saying about the pattern, calcium is smal dots and that just looks like classic overwatering to me, same exact thing I had in coco before they got full roots. 