Just wondering if anybody could tell me or, direct me to a link on how to make a foliar spray using either calcium edta or acetate. Thanks in advance.
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Where’s the Afghan hash farmers at?
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Calcium acetate is what you get when you dissolve egg shells in vinegar. Its also called WCA, water soluble calcium.
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They don’t need any. Their soils are very alkaline as it is.
Chris Trump is the man when it comes to knf inputs.
I already have a bag of Ca Acetate. I just need to know how much to dissolve to a gallon of water to make a foliar spray. Can’t find anything on the internet except to boil egg shells. 
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I can’t find any info on it either, but you could experiment on just one branch to make sure it isn’t too strong. I’d start with like 1/2 teaspoon per gal 
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Here’s one reference. Will need to do some math gymnastics to figure out the PPM depending on what you’ve got:
Calculate how they get 10% using mols. The chemical forumula for Calcium acetate is Ca(C₂H₃O₂)₂. The molecular weight is 158.17 g/mol while the molecular weight of the Ca is 40 g/mol. Water has a molecular weight of 18.025 g/mol.
Alternatively, you can estimate what they are figuring using the weight of the solution per gallon at 12.2 lbs. Pure water is 8.345 lbs/gal.
Another:
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Thanks. It’s better than nothing. With my limited mathematical abilities, a rough guestimate is around 3 grams per gallon? Maybe?
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Don’t think I’m figuring it out right lol! Math was never my strong point lol! 
Looks like calcium makes up 10% of the bottle and it recommends 3oz in 2gal. Sooo maybe a third of an Oz in 2gal which is about 8.5ml
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So, I’m trying to figure out how they are getting 10% Ca ions into a gallon of water.
The solubility of Calcium acetate in water is ~34.7 g/100ml at room temperature. There are 3785 ml / gallon. 3785 ml * 34.7g/100ml = 1313 grams.
At 1313 grams, that’s [1313 g / (158.17 g/mol)] = 8.3 mols calcium acetate per gallon max. 8.3 mols calcium acetate translates to ((40 g/mol) / (158.17 g/mol)) * 8.3 mols = 2.1 mols Ca ions.
For a gallon of water, there are 210 mols. 2.1 mols / 210 mols = 1% solution of Ca ions.
That’s the maximum solubility at room temperature into water. Curious. But, they’ve noted the PH is at 2.0 while calcium acetate in solution itself is rather neutral. It’s common to modify the solubility parameters based on PH. Though, I have not been able to find a solubility curve for Calcium acetate vs PH to verify this.
So, needless to say, I haven’t figured this out based on those datasheets. Urmm…
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Thanks everyone for helping out. Sure do appreciate it. Yeah. This is definitely starting to hurt my brain a little. I assumed there would be thousands of recipes on how to make a calcium foliar spray on line lol! It’s kind of odd the only thing really is the egg shell deal. Maybe if we figure this out we should bottle and sell it lol! 
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Definitely hurt my brain too. 
lots of info though
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Here another reference from a paper on foliar application for tomatoes:
https://www.scielo.br/j/rceres/a/HmfXZYWw8yrNyVSYmXt97Jz/?format=pdf&lang=en
300 mg/L = 300 PPM in that study.
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That makes sense. A friend on another forum just said 3-5 grams a gallon.
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Interesting how high you can go with it. I think KNF suggests a 1:1000 dilution of the WCA.
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SA-10 WCA.pdf (502.0 KB)
I will just leave this here.
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Calcium doesn’t travel phloem very well. Travels xylem very well. It’s not entering foliarly.
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Acetate will oxidize calcium on leaf surface. Ph and calmag are so 2022. The new rage for 2023 is redox states and calmino.
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Large portion of home made egg shell concoctions have decomposed back to calcium carbonate. Might as well spray chalk.
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Chris Trump is a horrible person with zero logic behind his thought process. Unless the logic is to make as many people waste as much time as possible.
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What happens when Ca Acetate oxidizes on the leaf surface? Does that just make it unavailable? I foliar Ca Acetate a few times during veg and transition. Haven’t noticed any effects really positive or negative. Also, what is this Camino and redox state? I’ll try googling it and see if I can find any info.