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Leaf yellow/ brown spots

DonGeorge001
DonGeorge001started grow question 11 days ago
Hi growers I saw this on the leaves today Can someone tell what the issue might be Ph is at 6.5 , the plant is at week 3 , soil is all mix by biobizz , nutrients that i use are fish mix, root juice, active Vera, bio heaven
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m0use
m0useanswered grow question 11 days ago
fish mix = fertilizer 5-1-4 root juice = microbes for roots 0.1-0-.01 active Vera = enzymes and other stuff ?-?-? bio heaven = micros and other stuff 0.91-0.18-0.24 https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg https://www.biobizz.com/wp-content/uploads/2024/04/Nutrient-Schedule-EN-2024.pdf The feed chart, Notice the PH and CalMg thing at the bottom. This kinda looks like calcium but I'm used to it being more random on the leaves, not following a pattern. Mg does follow a pattern but I'm used to it going yellow not broish. The P content in this feed is low as well. I would start with PH and confirm its on point then add a bit more P and Ca, but first check how much Ca is in fish mix. If any. It should have a good amount I would think, might need to email BioBuzz for this information if its missing from the label. If its no to low. start with CaMg first, and remeber they say only use fishmix for veg and back to biogrow in flower, follow the feed chart. dillute down to your desired EC after mixing the ratios.
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Seedler
Seedleranswered grow question 11 days ago
Magnesium deficiency. Either correct the pH a bit towards 6, so it can be absorbed a bit better or you buy a calmag product (i would highly recommend, i always use it) and it will fix itself. The problem will take a while to get fixed since you grow organic. necrotic spots will stay that and not recover tho Or maybe if you run really low on fertilizer, and give a bit more, goood luck
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