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Their appears to be rusty looking cracks on a few ...
TheBudWhispereranswered grow question 6 years ago
Hey bud, I’m going to assume you’re ph is correct. If so, you almost certainly have a calcium or magnesium deficiency. It looks more to me like calcium as I went through the same issue on an amnesia haze grow and the pics of it online are identical to mine/yours. Question - did you “pre-prime” your medium with cal mag before planting? I see you’re already using a cal mag supplement and if so, then I’d agree you could be faced with some nute lockout as well. That said, if you’re only seeing this on 1 or 2 leaves it may not be all that much of an issue and easily corrected with some moderation. I’d give them a solid ph’d water “rinse” (not a flush) with 30% runoff. Then some cal mag after dry and slowly dial back up the nutes over time. This is could be considered a low stress way to identify your issue. Maybe even leave out the nutes until flower starts. You’ve only got a couple weeks until then anyway. Hope it helps - you’ve got some great opinion here already👍
Mrs_Larimaranswered grow question 6 years ago
I Agree Athos. i think your ph is not corect . plants need a" PH-corridor " where they are able to take the nutrients from the soil/ water. if the ph is to high / to low plants cant get her food and show defiencies.I will let you a link to a very helpful site.https://www.growweedeasy.com/cannabis-symptoms-pictures.. a defiency is normally no problem for a plant if its fixed . more worse is an nutrient excess. everythin ok dont panic... get your ph meter and fix the ph problem
read the solutions on the website, happy growing
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OutForRealanswered grow question 6 years ago
It's looks like a Mag deficiency to me , you can see that by the colour of the burnt. Anyway it could be neither a low Cal mag amount in your nuts mix or a ph fluctuation that may result a nutrients burnt but your ph is good at 5.8 it's the sweet spot. I woul low your nuts but increase my cal mag amount and chek my drain water Ph as in coco it is the only way to know the Ph your plants are dealing with ! I hope it will help you to make a killer grow 👍😁
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Athosanswered grow question 6 years ago
If you are going to use coco, you have to use an EC/PPM meter, else you are going to be guessing. Without that information I can only guess, but it looks like a mix of nute lockout, magnesium by the looks of it, and nutrient burn. Get a meter and feed 0.5 to 0.6 EC, primarily cal mag and some veg nutes.
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