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Cal mag ? Or just normal fall colors appearing ?

Basementgrow05
Basementgrow05started grow question 3 years ago
Noticed this one just one of my plants of of 3 they are all fed the same and watered the same what could it be ?
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Week 8
Leaves. Color - Dark-brown
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sir_isO
sir_isOanswered grow question 3 years ago
I see the nutrient you use is 4-6-2 That's not a great ratio, imo. Okay as a root boosting amendment, or late veg/early flower, or if you've mixed it with another PK source (like MKP) for flowering. Typically, ratios in flowering should be closer to something like 1-5-3 imo. Though ideal balance varies a bit depending on plant, flower structure and maturity. Like a plant with more leaf/branch materials, more nodes will typically imply a bit more potassium. Less nodes, branching, though larger flowers, typically more phosphorus.
Basementgrow05
Basementgrow05answered grow question 3 years ago
I have been putting 484 more towards flower that’s my bad I forgot too out it in
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sir_isO
sir_isOanswered grow question 3 years ago
Like, as an example... You can grow things in 40% calcium soils. You cannot grow things in 40% magnesium soils. Ideal ratios in nature vary from around 4-10 calcium for 1 magnesium...supplements are often closer to around 2-4 calcium to magnesium, from what I've seen (though I've never used any), and people often use "soilless" stuff, like heavy coco, perlite or maybe at best "light soil" mixes, which makes that calcium deficiency/calmag imbalance more apparent.
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sir_isO
sir_isOanswered grow question 3 years ago
"Hi mate, that looks like cal mag to me! Shes looking a little dark so maybe cut the N a little. Dont forget cal mag contains N so take that into account when mixing your nutes" @InspireMe Calmag doesn't necessarily contain nitrogen, sometimes it also contains other things (iron for instance), depends on what you're using. Strictly, calmag is only calcium and magnesium, though. And then, the ratios of supplements often differ, too but are typically biased towards magnesium (relative to natural abundance and soils). And I find people most often have calcium deficiency issues, more so than magnesium, along with nitro excesses.
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sir_isO
sir_isOanswered grow question 3 years ago
First, nitro excess. Time and again, I see people ask about calmag when they have nitro excess. Deal with that, and apparent calmag issues will likely seem less of an issue. Nutrient excesses, imbalances can cause signs of "false" deficiencies because of balance being so skewed, resulting localized pH issues and effectively lockout of other elements.
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InspireMe
InspireMeanswered grow question 3 years ago
Hi mate, that looks like cal mag to me! Shes looking a little dark so maybe cut the N a little. Dont forget cal mag contains N so take that into account when mixing your nutes Hope this helps 🙂
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