Elemental PPM feed schedule per growth phase

2com said:

I get different number(s) from my calc, for jacks. The Ca is higher than the Mg, 120 : 91. And 230 for K.

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Good eye. Could be older formula(s) on the matrix.

I'll double check against gln mc2part calc, and @Renfro killer ppm calc.

Oh. Keep in mind. The calnits can vary. 15. 15.5 and varying Ca %.

For sure, I make mistakes at times in my nute spreadsheets.

TintEastwood said:

Good eye. Could be older formula(s) on the matrix.

I'll double check against gln mc2part calc, and @Renfro killer ppm calc.

Oh. Keep in mind. The calnits can vary. 15. 15.5 and varying Ca %.

For sure, I make mistakes at times in my nute spreadsheets.

Click to expand...

One thing to remember is that one can easily add a product to the sheet using the label #'s.

Step 1: Input the product label %'s into this part of the tools tab (blue box) and make sure to start with all zero's lol.



Step 2: Copy the values in the green box



Step 3: Go to the Products tab and scroll down to a new product line and paste the "values only" into the new product row and name your product.



Now you can go to the adds tab and use your new product. If you don't wish to mess with a SG # when adding a product then just work with the product be mass in grams instead of volume in ml.

2com said:

I get different number(s) from my calc, for jacks. The Ca is higher than the Mg, 120 : 91. And 230 for K.

Click to expand...

My bad. I remember correcting that Ca/Mg swap. Multiple file versions on PC and phones.
This should be purdy accurate. Thanks for pointing out errors, much appreciated.

RonnieB2 said:

I use jacks 3, 2, 1 but replaced his calcium with YaraLiva 15-0-0. At 100% strength my EC 2.0-2.2 thats before cal mag and silica. And dose Humic acid, fulvic acid, re-charge, tribus grow bacteria, then switch to bloom bacteria, Neptune's harvest 0-0-1, and a sugar nutrient like molasses, or sweet sticky once a week.

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what medium are you growing in?

TintEastwood said:

Good eye. Could be older formula(s) on the matrix.

I'll double check against gln mc2part calc, and @Renfro killer ppm calc.

Oh. Keep in mind. The calnits can vary. 15. 15.5 and varying Ca %.

For sure, I make mistakes at times in my nute spreadsheets.

Click to expand...

I used and primarily use Renfro's calc.

Yup, mine is yaraliva N-15.5%, Ca-19%. But just looked and there's varying info on that (the Ca mostly). The website says there's Boron as well, in the description.
--Just (re)found this for yaraliva: https://nature.berkeley.edu/oxford-facility/sites/edu.child.oxford-facility/files/Fert_YaraLivaCalcinit.pdf
There's some good info in this^ actually, "compatibility" mentions the reactions with sulphates and phosphates.

Renfro said:

One thing to remember is that one can easily add a product to the sheet using the label #'s.

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I've added a few products, and added some ratio calcs too. I wish I was better with excel though.

where can I find these calculators?

Kassiopeija said:

where can I find these calculators?

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Renfro's is in the thread in his sig. (in the post above^). Then there's online ones and hydrobuddy (I think it's called).

2com said:

Renfro's is in the thread in his sig. (in the post above^). Then there's online ones and hydrobuddy (I think it's called).

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thx, had them permanently unabled

Kassiopeija said:

thx, had them permanently unabled

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Another. Near bottom of page...

below where i copied the Steiner formula was this little blurb (which is way above what i know about chemistry)

To edit more info with steiner. There are ranges within his method of developing solutions. So, many formulas can be designed while still keeping ion interaction, precipitation or otherwise balance in mind.
He recommends these ion ranges (in meq/l)



Whereby K+Ca+Mg = N+P+S always (in meq/l) (NH4 added to cations if used)

can any of you explain this for me please??

rkymtnman said:

can any of you explain this for me please??

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well your question isn't really precise so I have a hard time understanding what you're searching for... but... in general... whenever you build a fertilizer the amount of An- and Kations need to be en parre (somewhat)... because negatively charged ions are "brought into" the roots by a different channel (or symporter) than positive ions - so the *exchange-ions* vary.

So there needs to be a balance otherwise the substrate has a tendency to become either too acidic or alkaline over time.

Advanced Nutrients did a study on cannabis nutes back in 2003. They used indica as the test subject. They concluded the basic nutritional requirements for cannabis are the following:

N = 160ppm
P = 40ppm
K = 200ppm

4-1-5

One of the problems that arise from using too much P is something a lot of people don't realize. Too much P creates a harsh taste. How? When P is combusted, it forms phosphorus pentoxide. It's an irritant at low concentrations.

Kassiopeija said:

well your question isn't really precise so I have a hard time understanding what you're searching for

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more so with this:
K+Ca+Mg = N+P+S

so the elemental ppms of the left side should equal or be close to equal with the right side of the equation?

Shape Shifter said:

Advanced Nutrients did a study on cannabis nutes back in 2003. They used indica as the test subject. They concluded the basic nutritional requirements for cannabis are the following:

N = 160ppm
P = 40ppm
K = 200ppm

4-1-5

One of the problems that arise from using too much P is something a lot of people don't realize. Too much P creates a harsh taste. How? When P is combusted, it forms phosphorus pentoxide. It's an irritant at low concentrations.

Click to expand...

is this what you are referencing??

rkymtnman said:

is this what you are referencing??

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No. I got that from one of the most comprehensive resources that every grower should read. Long read. I saved it as a PDF. It's 142 pages.
Can't directly link the page where this info is.

https://medteknutrients.com.au/hydroponic-nutrient-science/

Click on the link that says something about medical marijuana and phosphorus.

Shape Shifter said:

No. I got that from one of the most comprehensive resources that every grower should read. Long read. I saved it as a PDF. It's 142 pages.
Can't directly link the page where this info is.

https://medteknutrients.com.au/hydroponic-nutrient-science/

Click on the link that says something about medical marijuana and phosphorus.

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my bad. i was talking about the AN study. if you look at that thread i linked, he eventually gets to a bunch of graphs of strains tested by AN.

but thanks for that link, i will save that and check it out too.

rkymtnman said:

below where i copied the Steiner formula was this little blurb (which is way above what i know about chemistry)

To edit more info with steiner. There are ranges within his method of developing solutions. So, many formulas can be designed while still keeping ion interaction, precipitation or otherwise balance in mind.
He recommends these ion ranges (in meq/l)

Whereby K+Ca+Mg = N+P+S always (in meq/l) (NH4 added to cations if used)

can any of you explain this for me please??

Click to expand...

I saw the same thing and when I came across it I looked up and realized I could no longer see the top of the rabbit hole I was now in.

This explains in somewhat more detail, I only skimmed it so far. None of this is helping me diagnose the current issue(s), frustrating.

One guest on the podcast I posted earlier, who brought up hoagland, said that it (too) was designed to be a "balanced" formula (talking about cation/anion). I think that formula balance is a requirement, essentially.

Edit: forgot link.

Shape Shifter said:

One of the problems that arise from using too much P is something a lot of people don't realize. Too much P creates a harsh taste. How? When P is combusted, it forms phosphorus pentoxide. It's an irritant at low concentrations.

Click to expand...

I really would like to know more about leftover residue of nutes in plant tissue - how great the situation in the pot has an influence of the compounds of said tissue...

2com said:

I think that formula balance is a requirement, essentially.

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more or less, and since there are more kations it's usually S than can be further expanded to make the ratio even.

rkymtnman said:

K+Ca+Mg = N+P+S

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sorry for my previous post, shouldve been more polite... anyway...
well, N-feeding strategy is a whole topic in itself, as it can be either an- or kation, even neutral (Urea).

@rkymtnman @TintEastwood
Nutrient Solution Balancing video by same group as my previous post's with the article on it. This helps a bit, generally.

2com said:

This helps a bit, generally.

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over an hour long? yikes. i'll have to handle that one in small chunks.