Is calcium carbonate more easily assimilated by cannabis than calcium nitrate?

[Beachwalker]

Any idea how long it takes the shell to break down for the plants?
I may go that route as the calcium carbonate I have was just a large bottle of it for bone health etc so it isn't pure so I will go with something I know the contents of, this has other ingredients listed on my bottle of it so going to switch .
Any idea How much of the shell suggested to use say for a 5 gallon pot of promix ?

I don't, but I use lime which I know breaks down quickly in soil, not sure about Pro mix. they say use one tablespoon lime per gallon of soil. The doctor would know about the oyster shell, good luck!

 

[oldbeancounter]

I don't, but I use lime which I know breaks down quickly in soil, not sure about Pro mix. they say use one tablespoon lime per gallon of soil. The doctor would know about the oyster shell, good luck!

Thanks for info.

The cal-mag they sell is a major ripoff.
I just got the new Mega Crop today and hope to find someone who has old numbers for cal/mag as i was using the sample bag and didn't know the calcium/magnesium as it wasnt on printed on the label.
The new Mega Crop formula has 5.6% calcium and 2.3 % magnesium.
Does anyone know if it changed from old formula?
new formula NPK is 9-6-17 but again no idea if it changed?
Whatever I was doing was working but with old formula so hopefully nothing major changed.

 

[Beachwalker]

Thanks for info.

The cal-mag they sell is a major ripoff.
I just got the new Mega Crop today and hope to find someone who has old numbers for cal/mag as i was using the sample bag and didn't know the calcium/magnesium as it wasnt on printed on the label.
The new Mega Crop formula has 5.6% calcium and 2.3 % magnesium.
Does anyone know if it changed from old formula?
new formula NPK is 9-6-17 but again no idea if it changed?
Whatever I was doing was working but with old formula so hopefully nothing major changed.

It did change from the old formula but you'd have to go to the mega crop thread on here for specifics, there's all kinds of info and knowledgeable people there

The guy from Greenleaf used to be there too but he's gone now I don't know why, something happen. I can't tell you too much specific about megacrop, I've tried it but I used other stuff now

 

[oldbeancounter]

It did change from the old formula but you'd have to go to the mega crop thread on here for specifics, there's all kinds of info and knowledgeable people there

The guy from Greenleaf used to be there too but he's gone now I don't know why, something happen. I can't tell you too much specific about megacrop, I've tried it but I used other stuff now

Edit

Thanks for your help.
I know there is some issues with sponsorship which I will stay out of..

 

[Beachwalker]

Thanks for your help.
I know there is some issues with sponsorship which I will stay out of..

Since I got back into growing I've spent so much money on GH flora and it's a fine product but it's up to $38 a gallon now for one of the 3 parts and it's just not worth it

so I've completely gone the other way, using only inexpensive dry powders. Mega crop is a good choice, myself I use just 2 products plus Cal/Mag now and I'm happy growing this way, I'm never buying the stuff in the fancy bottles again

 

[Jefferson1977]

and a similar question:

is it true that well water has molecules of CaCO3 that are too big to be used by the plant? i've read that a few places yet can't find proof if it's true or not.

My well water literally leaves white chalk residue (CAC03) when it dries. I suspect these particles to be too big to be assimilated.

 

[rkymtnman]

My well water literally leaves white chalk residue (CAC03) when it dries. I suspect these particles to be too big to be assimilated.

have you had it analysed?? i'll have to find my report from last year and post the numbers.

what EC/ppm is your water? i'm about 0.2 to 0.25 throughout the year

 

[oldbeancounter]

Since I got back into growing I've spent so much money on GH flora and it's a fine product but it's up to $38 a gallon now for one of the 3 parts and it's just not worth it

so I've completely gone the other way, using only inexpensive dry powders. Mega crop is a good choice, myself I use just 2 products plus Cal/Mag now and I'm happy growing this way, I'm never buying the stuff in the fancy bottles again

I think most of it is BS
Markup is crazy when you can get a bag of that shell for 20.00
https://www.tscstores.com/50LBS-COSTAL-BRAND-OYSTER-SHELL-P8747.aspx

 

[rkymtnman]

I think most of it is BS
Markup is crazy when you can get a bag of that shell for 20.00
https://www.tscstores.com/50LBS-COSTAL-BRAND-OYSTER-SHELL-P8747.aspx

when i picked up dog food at our feed store today i looked at the OS and it was 17.99 a bag.

 

[Beachwalker]

I could pick them up on my walk on the shore if I wanted LOL but I'm not going to sit there and grind them up! Actually not so many around anymore but anyway I'm sticking with the lime like the doctor recommended above, seems to be working well so far I may pick some up down the road I'm going to need some ca. for my tomatoes before long anyway, I would make my own soil but I barely have the room right now as it is so for now this is working

 

[oldbeancounter]

when i picked up dog food at our feed store today i looked at the OS and it was 17.99 a bag.

I just cant believe all the brands that you have to add 10 plus bottle to.

 

[TintEastwood]

Thanks for info.

The cal-mag they sell is a major ripoff.
I just got the new Mega Crop today and hope to find someone who has old numbers for cal/mag as i was using the sample bag and didn't know the calcium/magnesium as it wasnt on printed on the label.
The new Mega Crop formula has 5.6% calcium and 2.3 % magnesium.
Does anyone know if it changed from old formula?
new formula NPK is 9-6-17 but again no idea if it changed?
Whatever I was doing was working but with old formula so hopefully nothing major changed.

MC. Pre 2.0

 

[Jefferson1977]

have you had it analysed?? i'll have to find my report from last year and post the numbers.

what EC/ppm is your water? i'm about 0.2 to 0.25 throughout the year

Yeah, it is mostly CaCO3 with 500 x the EPA limit for manganese too, lol. I'm like 1.0 EC .

 

[oldbeancounter]

MC. Pre 2.0
View attachment 4304488

Thanks
Calcium has not changed, it is still the 5.6 % as I just checked the new bag I received a few days ago from Mega Crop.




.

 

[Roger A. Shrubber]

i'm not sure one is more readily available than the other, as far as i'm aware, you use lime when you want to raise ph, and gypsum when you don't...they both take a couple of months to start breaking down, so adding either to a plant that's having problems now is not going to make a huge difference.

 

[oldbeancounter]

i'm not sure one is more readily available than the other, as far as i'm aware, you use lime when you want to raise ph, and gypsum when you don't...they both take a couple of months to start breaking down, so adding either to a plant that's having problems now is not going to make a huge difference.

Thank you for the info.
I think I may go gypsum down the road to add to my soil mix before planting.
I do have some FFOF and a small amount of dolomite lime in this run from when I first first potted plants so I will not bother as it is too late to be adding stuff.
So far plants are doing ok with what I am doing.
I have been adding about 200 PPM of calcium carbonate every 4th feed , no idea if it helps lol

 

[Roger A. Shrubber]

Thank you for the info.
I think I may go gypsum down the road to add to my soil mix before planting.
I do have some FFOF and a small amount of dolomite lime in this run from when I first first potted plants so I will not bother as it is too late to be adding stuff.
So far plants are doing ok with what I am doing.
I have been adding about 200 PPM of calcium carbonate every 4th feed , no idea if it helps lol

if it's dissolved in your feed, the plant will be absorbing some of it, but be careful about what nutes you're adding it to. anything that has a lot of sulfur will cause at least some of your calcium and sulfur to precipitate, and be useless to your plants.

 

[oldbeancounter]

if it's dissolved in your feed, the plant will be absorbing some of it, but be careful about what nutes you're adding it to. anything that has a lot of sulfur will cause at least some of your calcium and sulfur to precipitate, and be useless to your plants.

Ok, I will take that into account when I figure out how I will feed next grow
I may run just auto's still thinking it over.

 

[Skybound420]

Thanks for info.

The cal-mag they sell is a major ripoff.
I just got the new Mega Crop today and hope to find someone who has old numbers for cal/mag as i was using the sample bag and didn't know the calcium/magnesium as it wasnt on printed on the label.
The new Mega Crop formula has 5.6% calcium and 2.3 % magnesium.
Does anyone know if it changed from old formula?
new formula NPK is 9-6-17 but again no idea if it changed?
Whatever I was doing was working but with old formula so hopefully nothing major changed.

I have Megacrop loaded into Hydro Buddy and the formulation I have has Ca=6.5% and Mg=1.9%. This is how MC stacks up against other blends. IMO, MC is garbage, but everyone seems to be having decent results with it so maybe I'm dead ass wrong about it?

I jumped on this thread because I (a hydro grower) just adopted using Cali Carb as a secondary source of calcium. I mix my own nutrients 100% from salts, and I no longer use anybody else's blend. No JR Peter's or Jack's or any of them. That said, I am trying to grow high brix hydro which according to the internet generally will produce a comparable result to pissing up a rain pipe, lol. But still I press on. I'm trying to understand how soluble or available CalCarb is. I mixed a concentrate last night and mixed it into 3 reservoirs already, but I suspect it isn't as available as the Ca in Cal Nite. Reading this thread is part of my due diligence in determining how much I can rely on Cal Carb. Sadly for me, this thread is mostly about soils. That's usually the case when searching anything about Cali Carb. I got mine from (KELP4LESS). The description says it's water soluble and since Hydro Buddy already has CaCO3 formulated, I figure it's safe to use in hydro. But still I want more assurance that I made the right choice.

 

[rkymtnman]

I have Megacrop loaded into Hydro Buddy and the formulation I have has Ca=6.5% and Mg=1.9%. This is how MC stacks up against other blends. IMO, MC is garbage, but everyone seems to be having decent results with it so maybe I'm dead ass wrong about it?

I jumped on this thread because I (a hydro grower) just adopted using Cali Carb as a secondary source of calcium. I mix my own nutrients 100% from salts, and I no longer use anybody else's blend. No JR Peter's or Jack's or any of them. That said, I am trying to grow high brix hydro which according to the internet generally will produce a comparable result to pissing up a rain pipe, lol. But still I press on. I'm trying to understand how soluble or available CalCarb is. I mixed a concentrate last night and mixed it into 3 reservoirs already, but I suspect it isn't as available as the Ca in Cal Nite. Reading this thread is part of my due diligence in determining how much I can rely on Cal Carb. Sadly for me, this thread is mostly about soils. That's usually the case when searching anything about Cali Carb. I got mine from (KELP4LESS). The description says it's water soluble and since Hydro Buddy already has CaCO3 formulated, I figure it's safe to use in hydro. But still I want more assurance that I made the right choice.

View attachment 4325625

what are your target ppm's for veg and late bloom? i saw your mid blooms. is that from end of stretch to last few weeks?