Fertilizer burn or nutrient deficiency

Thanks everyone. Just checked my ph and it's 6.8. I will flush with lower pH water

Hey buddy :-) what is your pH and Ec?

Looks like a P.H. issue. Check out this link for more info on that. https://www.growweedeasy.com/cannabis-plant-problems/ph-fluctuations If you have the time check out my very first grow ever! Cheer and Happy Growing!

You're going to get a lot of people suggest deficiency in Cal or Mag or both but I doubt its either. You're growing in soil and have been supplementing since week 1 with fertilizer, even though your soil is fertilized unless you're growing in raw pete. And you've been adding Cal Mag so a deficiency would only be from ph, not from lack of nutrients. It looks like you have had at least one nute surplus (toxicity) since at least week 5: you can see it in your photos. Its why your lowest leaves look so dark compared to the new (which began in week 5). Phosphorous is one candidate. It can make your plant look like that and excess P displaces Ca and Mg so it can resemble a deficiency in either, but the clue that isn't is that you've been giving it plenty of Cal Mag and P surplus begins as deep green leaves. After 3 weeks, it looks like what you have now. There may be burn there to. Either way, the solution is to flush. You might even want to add a flushing agent to remove all the surplus salts if you can get it locally (its not something to delay the flush for though). Then you nee to really scale back your nutes. A lot.

Hello.. Hope you are well.. Just had a quick look at ur dairy.. The way i try to troubleshoot probs is 1st check wk ur on n look at grow conditions.. Then I'll jump bk to 1st wk and go thru each wk n try to spot any possible errors using pics and data provided n cross that with any problems that occurred.. Everything looks great except 1 thing stands out.. I can see u started feeding her straight away in soil.. If growing in soil ur plants will not need any food for usually 2-3wks depending on quality of soil and strain /speed of growth.. Knowing this allows us fellow growers try to help.. So.. First give her a flush with plain ph'd water then wen feeding her nxt i wud cut bk at least 10%on nutes.. Dont forget to water inbetween feeds aswell so not to create nutrient build ups in future.. Sum ppl wster, water, feed n repeat i prefer to cut bk on nutes n wster, feed n repeat.. If u get top quality soil with lots of perlite and sum vermiculite added ur off to a gud start.. Stay safe n gud luck with her.. 👍🍀

That is Magnesium def Not familiar with your nuets but thats what it is