Calcium Chloride???

My last grow was my first under my TS1000s. In the latter stages of flower I got some Calcium def on a few of the plants. I have a mate that is a chemist and he suggested using this as a source of calcium that would be instantly usable by the plant.


I know most people normally just reach for the CalMag. But I have no problems with Mg, just the Ca.

So can anyone see any problems with using Calcium Chloride? I was thinking using a tablespoon (18ml) per 5L, once a week, starting when they go in to flower.

rkymtnman said:

https://cuttingedgesolutions.com/additives/strength-family/plant-amp/

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Interesting.

haven't used it personally since i use well water. but why fix a Ca problem with cal/mag? n, ca, and mg.

Are you sure you were having Ca issues late into flower and not too much K or something?

rkymtnman said:

haven't used it personally since i use well water. but why fix a Ca problem with cal/mag? n, ca, and mg.

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This is exactly how I am thinking. I don't have a problem with N or Mg, so why would I want to add more? Also, CalMag is so damn expensive considering it is just Calcium Nitrate and Epsom Salts.

I think I am going to get some and see how it goes.

speedwell68 said:

This is exactly how I am thinking. I don't have a problem with N or Mg, so why would I want to add more? Also, CalMag is so damn expensive considering it is just Calcium Nitrate and Epsom Salts.

I think I am going to get some and see how it goes.

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there is a guy/gal here that has used it and said it works perfect. wish i could remember or i'd tag him/her.

f.r said:

Are you sure you were having Ca issues late into flower and not too much K or something?

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Nope, definitely Ca. Too much K was considered. I wasn't giving too much K to begin with, NPK 2-3-4 and it stopped progressing when I gave some calcium nitrate solution. But that led to a little N toxicity. When I spoke to my mate about it his first suggestion was too much K.

speedwell68 said:

... Also, CalMag is so damn expensive considering it is just Calcium Nitrate and Epsom Salts....

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Depends on the brand.
GH Calmagic (1-0-0) used Calcium Glucoheptonate, Calcium Nitrate, Iron, and Magnesium Nitrate.

5% Ca, 1.5% Mg

Yes you can use water soluble calcium chloride.

speedwell68 said:

Nope, definitely Ca. Too much K was considered. I wasn't giving too much K to begin with, NPK 2-3-4 and it stopped progressing when I gave some calcium nitrate solution. But that led to a little N toxicity. When I spoke to my mate about it his first suggestion was too much K.

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Fair enough, also water movement through the plant can greatly affect calcium uptake are your temps good?

Just weird seeing a cal deficiency late in flower is all at least to me

Yeah i used to farm tomatoes and used it on the more calcium hungry varieties like cherokee purple. I foliar fed with it like a teaspoon per gallon i think. it absorbs super easy on roots or leaves. I would spray seedlings every once in a while if I had a little leftover and it didn't hurt when they're like 10 inches tall...never used it on sprouts though. but yeah if you have calcium deficiency it will cure it.

A pound of this shit should last you about 10 years.

Amino acid chelated Calcium Chloride is pretty popular in agriculture, I think one brand is called Gro-Cal, but most major fertilizer companies make it.