Question about jacks 321

DoubleD5374

Well-Known Member
So I have the first two parts of the equation , but I’m missing the epsom salts . I have several 2.5 lb bags of epsom salts , that I use in my soil mixes . Would that be alright to substitute till I get the 3rd part delivered ?

I also have the jacks finish. I just wanna make sure I have my nutrients lined out . I needed something cheaper to feed than the nectar of the gods line , and the earth juice line is Being discontinued as far as I can tell .
I no longer care about synthetic or organic at this point - just being able to feed everything, and have it flourish. .

I also have calmag , if that should be added in place of the epsom salts .
 

Delps8

Well-Known Member
Epsom salts is Epsom salts.
As long as its not some fragranced bath type.
Good point about the fragrance.

Also, if you're measuring by weight (which you should be), remember that Epsom salts are hygroscopic. I've never checked to see the impact so I buy a new bag for each grow and, as with Part A and Part B, keep the epsom in a sealed container.
 

Delps8

Well-Known Member
I've been using a 10lbs bag of Epsom salt from the local Walmart for almost 4 years and I'm not even half way through the thing. No reason to buy it from jacks unless you're OCD about matching bags.
And there goes my idea about needing to get a new bag for each grow! :-)
 

Delps8

Well-Known Member
I think I heard it in a video on their site that Jack's introduced a finish nute only because of consumer demand. I use the straight formulation from drop to chop…except for my last grow and that was a total goat rope.

I decided to try their "bloom" product. Never again. It was a death match with dropping pH and then I read on scienceinhydroponics.com that there's no reason to add a bloom booster in hydro because P is highly available in hydro. Learned my lesson.
 

Tolerance Break

Well-Known Member
I think I heard it in a video on their site that Jack's introduced a finish nute only because of consumer demand. I use the straight formulation from drop to chop…except for my last grow and that was a total goat rope.

I decided to try their "bloom" product. Never again. It was a death match with dropping pH and then I read on scienceinhydroponics.com that there's no reason to add a bloom booster in hydro because P is highly available in hydro. Learned my lesson.
I feel like we all make the same mistake lol
 

DoubleD5374

Well-Known Member
I think I heard it in a video on their site that Jack's introduced a finish nute only because of consumer demand. I use the straight formulation from drop to chop…except for my last grow and that was a total goat rope.

I decided to try their "bloom" product. Never again. It was a death match with dropping pH and then I read on scienceinhydroponics.com that there's no reason to add a bloom booster in hydro because P is highly available in hydro. Learned my lesson.
I guess technically it’s hydro because they’re in 10 gallon fabric pots in coco - but I’m outdoors . I’ve got 6-9ft trees , and they’re stupid hungry . And hand watering isn’t cutting it - 275 gallon reservoirs and a 90 gpm pump turned way down , is the ticket. I’m going through 250-500 gallons per day. The earth juice seablast grow and bloom has been awesome but supply is very light online . My local store replaced it with jacks - so that’s what I’m rolling with
 

ProPheT 216

Well-Known Member
I buy the power grow magnesium sulfate same s***. Personally I would say don't use the Jack's finish and just use the 512/26 from veg to flower. Also, I would say you don't need magnesium sulfate at all. You can easily use 4 g of Jack's, 2 g of calcium nitrate and no Epsom salts and achieve better PPM numbers than you would doing the 321 recipe
 

Tolerance Break

Well-Known Member
I buy the power grow magnesium sulfate same s***. Personally I would say don't use the Jack's finish and just use the 512/26 from veg to flower. Also, I would say you don't need magnesium sulfate at all. You can easily use 4 g of Jack's, 2 g of calcium nitrate and no Epsom salts and achieve better PPM numbers than you would doing the 321 recipe
I see people claiming the 4-2-0 method works, but I'm skeptical it's ubiquitous between all methods of hydro.
 
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