Deficiency Any guesses
- Thread starter MOduff
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should I use a stronger dose of cal mag like 5 ml instead of 3? I just don't want it to spread too much .
I would leave the damaged leafs that are still mostly green alone, and remove any that are over half gone. After looking at the new pics, I think you may have more than Mg def, those top leaves look a little K def too. Have you checked the pH of your soil? This could be early symptoms of lockout. You are in soil, have you been pHing your water/feeds? How quickly did these syptoms come on? You really need to check your soil pH before deciding on a course of action here. Also, what nutes have you been feeding, how much, how often?
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Sorry MO', this slipped by me,.....looks like HM has you covered
... we need that info: what brand nute's and the dosage conc. and feed frequency, and soil brand... pH is very important to determine if it's off enough to mess with nute' uptake, or if you're just having a lack-of type defc.'s,...more likely the former. In that case, adding more nutes will make matters worse, not better, because the plant can't absorb them in the first place...Lower symptoms look like Mg defc., but it's very odd for it to hit the uppers like that; Mg is mobile within the plant, and it's the lower leaves that get Mg drawn from them, and show symptoms first,.. I think more than one is happening here; I see a little tip burn, from mild overfeeding, which can lead to off-pH,... upper yellowing looks more like Zn defc.; Zn is a micronutrient, not common to be deficient, but it happens,.. Do you have a pH meter? (I'm assuming you don't have a quality pH soil probe, which is by far best for in-soil measurements)... the alternative is a run-off test and calculation....it's suboptimal, but if you follow this guide, it'll work well enough-- https://www.autoflower.org/threads/...-testing-and-ph-estimation.41733/#post-928975
... run this and let us know,.. it will determine the next step to fixing this! :smoking:
Hey @Waira I have been using 
nutes and soil that I prepared from guano , egg shells reg soil perlite , bone meal and a few other things. I did a run- off test today and run- off was around 7.0. I have just a 4 in 1 soil tester with
fertility, ph, light and conductivity. Do you know how to use the fertility or conductivy setting ? Anyway I flushed them today and plan on giving them some deluted tomato and vegetable
10-12-12 powder diluted in water but I don't have a ppm meter . Does that sound good to give them after a few days?
nutes and soil that I prepared from guano , egg shells reg soil perlite , bone meal and a few other things. I did a run- off test today and run- off was around 7.0. I have just a 4 in 1 soil tester with fertility, ph, light and conductivity. Do you know how to use the fertility or conductivy setting ? Anyway I flushed them today and plan on giving them some deluted tomato and vegetable
10-12-12 powder diluted in water but I don't have a ppm meter . Does that sound good to give them after a few days?
