Jacks vs Masterblend vs ?

Dr. Who

Well-Known Member
All you guys love that Megacrop.
Many have asked me to try it....

I see the K value and cringe..... Rather high for me on a feed that's start to finish.... Limiting THC is an issue with high K delivery...

Also; What is the K source? Is it mixed, like is there K sulfate in there? Sulfate's and S content go hand in hand. That is important to me.
I want different S source's and I prefer sulfate compounds of several nutrient chem's.


As far as Jack's goes... Choose the Jack's Citrus for the higher S.
 

Wastei

Well-Known Member
All you guys love that Megacrop.
Many have asked me to try it....

I see the K value and cringe..... Rather high for me on a feed that's start to finish.... Limiting THC is an issue with high K delivery...

Also; What is the K source? Is it mixed, like is there K sulfate in there? Sulfate's and S content go hand in hand. That is important to me.
I want different S source's and I prefer sulfate compounds of several nutrient chem's.


As far as Jack's goes... Choose the Jack's Citrus for the higher S.
It has MPK like every other nutrient line and potassium nitrate. It also has Epsom salt in it. K values is not to high or at toxic levels. To many people on here have amazing results for this to be an actual issue.
 

Thegermling

Well-Known Member
This stuff stomps the shit out of Jack's, megacrop, floraflex, vb, all of em. You only use 2 grams per gallon because they use USP (pharmaceutical manufacture) grade salts.


You don’t ONLY need two grams of chemgro. It has no calcium AT ALL. Maybe you forgot about mentioning you need calnit. Made me turn on my computer for no reason.
To the OP, I ran MC for awhile but had leafy plants in flower. I ran under 4 grams (3-3.4 grams per gal to be exact.v2 version) but still got too dark green leafy plants in flower. Am trying jacks 321 and my plants don’t have the purple stems my plants had with mc. Am trying it in flower now.
 

curious2garden

Well-Known Mod
Staff member
It has MPK like every other nutrient line and potassium nitrate. It also has Epsom salt in it. K values is not to high or at toxic levels. To many people on here have amazing results for this to be an actual issue.
I'm really hoping you mean N and Mg not Epsom salt and M.

PS absolutely no offense intended I'm high af off my new table.
 

Wastei

Well-Known Member
I'm really hoping you mean N and Mg not Epsom salt and M.

PS absolutely no offense intended I'm high af off my new table.
He was asking for different sulfates and amounts of potassium . I listed MKP (Monopotassium phospate) and Epsom salt (Magnesium sulfate). Congratulations on your new table!
 
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Dr. Who

Well-Known Member
It has MPK like every other nutrient line and potassium nitrate. It also has Epsom salt in it. K values is not to high or at toxic levels. To many people on here have amazing results for this to be an actual issue.
MPK is not in every other nutrient line.!

I don't like the use of MPK in cannabis growing!
To much P and K in any ratio... Not only that, it contains NO S compounds.

Amazing looking results! The K value is simply TO MUCH for me to even try.
It limits THC potentials. So much that I'll put money on it lowering THC in a side by side with a few other lines of my choice!
 

smokebros

Well-Known Member
Been feeding Jacks 5-12-26 + Calcium Nitrate + Magnesium Sulfate (321 Formula) for going on two years. There's nothing on the market remotely close that has enticed me to switch to another nutrient line. IMO it's a bulletproof recipe, especially when coupled with a beneficial microbe. I prefer Orca.

It's inexpensive, contains all macros and micros, doesn't need any supplementation (I.E. cal-mag), PH stable, and it doesn't clog dripper lines. It checks all the boxes.

There was a slight learning curve when I ditched the bottled nutrients and went to powders, but I quickly figured it out and it's been quite effortless ever since.

I run Full strength [3.6 - 2.4 - 1.2] from start to finish and keep an EC of 1.8 - 2.0 & PH of 5.8 - 6.0.
 

Dr. Who

Well-Known Member
And others, like myself, have had less than positive results using MC. I tried V1 and V2, and though their second release had greater PH stability, it still left a lot to be desired. IMO, Jack's and V&B outperform it.

I suspected as much.

Any powder, like any other nutrient line. Takes a learning curve (Dial in) to get it right....
 

TintEastwood

Well-Known Member
Been feeding Jacks 5-12-26 + Calcium Nitrate + Magnesium Sulfate (321 Formula) for going on two years. There's nothing on the market remotely close that has enticed me to switch to another nutrient line. IMO it's a bulletproof recipe, especially when coupled with a beneficial microbe. I prefer Orca.

It's inexpensive, contains all macros and micros, doesn't need any supplementation (I.E. cal-mag), PH stable, and it doesn't clog dripper lines. It checks all the boxes.

There was a slight learning curve when I ditched the bottled nutrients and went to powders, but I quickly figured it out and it's been quite effortless ever since.

I run Full strength [3.6 - 2.4 - 1.2] from start to finish and keep an EC of 1.8 - 2.0 & PH of 5.8 - 6.0.
It's working for me too.

Here's the 100% numbers...
Screenshot_2020-01-07_09-00-27.png
 
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