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Defficiency? 1st grow

KisukeUrahara
KisukeUraharastarted grow question 3 years ago
I’m unsure of what is wrong with my plants. Leaves are turning yellowish colour and withering, first affecting old growth in week2F autoflower genetics. I use ph 6.4 water, runoff measured at 6.0.
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Leaves. Curl down
Leaves. Color - Yellow
Feeding. Deficiences
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sir_isO
sir_isOanswered grow question 3 years ago
My brother looked at your plant... And said "chelation effect". He didn't know your plant was flushed. What do you think that says about what flushing does? Chelation means, clearing....so, the flushing depleted a lot of nutrients the plant needed, even if it potentially lowered another excess. Trading 1 excess for 10 deficiencies is a shit idea. Which is why I often bitch about people saying "flush" so easily. It is often better to firstly consider ratios, balance, and/or counter effects, but a lot of that takes a while to learn (I mean I'm a noob). Healthy plants and soil don't need flushing. Shit, they practically are flush. Most plants growing tend to be mostly healthy, with a minor problem here and there, perhaps one specific problem that kept on being magnified for whatever reason. Your plant was generally doing okay, right? So then, when you "attack" that one problem, by doing something that affects EVERY OTHER aspect of the plant, that's fucking stupid, most often. And I don't mean to say that to be rude, I mean to say, people often give and repeat terrible advice. Coz in the case of soil, the soil would be such that you almost only water. But I understand, that is very tricky to achieve, and people use their commercial mixes and mediums which are very "light", so are easily depleted, changes are magnified, etc. I mean, if you throw a little bit of acid at a wall, it's not gonna do much, throw it at a sponge though... So if you know how to address specific issues and identify or know some about it before it is a significant issue, rather than reverting to general things like flushing, you'll do better.
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sir_isO
sir_isOanswered grow question 3 years ago
And I don't mean to say you should use lots of ANY of that, but at least some, where you can. Low amounts, fairly gradually. And your plant is like, not that young anymore, so...chances of it responding positively are diminishing. Those deficiencies also worsen senescence.
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sir_isO
sir_isOanswered grow question 3 years ago
@KisukeUrahara No, don't bother with getting calcitic lime. As I tried to explain, you need lots of varied elements as well as NPK. But NPK biased to flowering, so low N, high P, mid K ratio, regarding NPK. I don't know the composition of any of those nutrients, but whatever seems to have microelements, shit like iron, molybdenum, manganese, zinc, sulphur, copper, etc and the NPK ratio I mentioned. That is of course, vaguely speaking. The better you understand the nutrient balances, interactions, the more comfortable you'll grow. As it is, you flushed your plants, your "soil" is likely not exactly mineral rich like actual soil, and you have a bunch of deficiencies, so you need to address what you can, of that, while also tending to flowering (with the calmag and PK). It's the best I can say, coz I am not going to go through commercial supplement ingredient lists.
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KisukeUrahara
KisukeUraharaanswered grow question 3 years ago
@sir_isO Supermix 7-3-6, Roots and Xcell 1-0-0
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KisukeUrahara
KisukeUraharaanswered grow question 3 years ago
@sir_isO I use BioNova Soil Supermix, Roots, PK, Xcell, BN-Zym, PH- and BioBizz Cal/Mag. I'm glad I haven't used epsom yet, should I get calcitic lime and add mixture of epsom+calcitic?
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sir_isO
sir_isOanswered grow question 3 years ago
Like crudely, take what nutrients you have, some varied combination of it. And then, vaguely... Use your "guesstimation" for like 20% veg and 80% flower balance of nutrients.
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sir_isO
sir_isOanswered grow question 3 years ago
The problem with that is, magnesium should usually be less than calcium (especially in non actual, or light soil mediums) and the epsom salts would add more magnesium... So, ideally you'd use that with something like calcitic lime, or a more calcium biased source. What nutrients have you got, what's their composition? Coz I reckon you need small amounts of varied microelements, and a bit more of the major elements (NPK, and some calcium, magnesium, sulphur, carbon)... Epsom salts considering you use calmag, I would not really recommend, unless you replace the calmag, with epsom salts and some calcium source or some mix of that.
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KisukeUrahara
KisukeUraharaanswered grow question 3 years ago
@sir_isO I found out that epsom salt sources sulphur and magnesium, and the magnesium helps plants to take in nitrogen. Shall I give it a try or figure out something else, like the 1-3-2 npk you mentioned?
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sir_isO
sir_isOanswered grow question 3 years ago
@KisukeUrahara Makes perfect sense, BUT, pretty much any deficiency factor you address would improve it. Doesn't mean cal/mag was the only. Personally I would give it something with varied elements, molasses being a fairly cheap go to, but not all *that* complete. Some small amounts from a sulphur source, and a bit of something like 1-3-2 or similar ratio NPK (unless you have nitrogen in your calmag, which is often the case). Vaguely speaking.
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blvckswords
blvckswordsanswered grow question 3 years ago
Cool name lol but I agree w sir O I'm no pro but it's clear it's a bit more than just mag.
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KisukeUrahara
KisukeUraharaanswered grow question 3 years ago
@sir_isO I used Cal/mag yesterday, some plants are looking a bit better I'd say
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sir_isO
sir_isOanswered grow question 3 years ago
Imo, much more than just magnesium, because of the recent flushing.
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Hashy
Hashyanswered grow question 3 years ago
Looks like a magnesium problem. Give it some cal mag on next feed
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