Hi all, since being strongly advised to consider Jacks 321 for my grows, I’ve been binging on videos and articles on it. Given what it does for the money I am sold. I am also confused. There are a ton of suggestions about additives to assist with root development, vegetation and flowering, most of them different. Is there a definitive list of what I should add to the Jack’s routine? I care more about outcome than cost. Any help appreciated!
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Not knocking on Jacks but you should check out Mantis Buffered Nutrients. One part and works just as well if not better than most nutrient lines out there.
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I would suggest reading @Hellraiser grows skittlez and Banana Kush journal, or @AfgVet retirement grow. I am on my first grow, in coco with Jacks. A pH meter and an EC meter were a couple of my first purchases. My plants got nothing but Jacks part A and B and Epsom salts until I switched to flower, I am at day 19 of flower 65 days since sprouting.
If you like I will put a tag in my Journal which isn’t as lengthy a read as those others but I have kept things simple. My well water has about 90 ppm which is apparently good. Per gallon of water I add 3.6 grams of part A and mix. I add 1.2 grams of Epsom Salts and mix. Let it sit for ten minutes and mix again. I add 2.4 grams of part B and mix and then adjust PH to 5.8. That was used from seeds sprouting until I switched to flower. At that point I am starting with 2 ml of silica, then 2 grams of part A, then 2 grams of Epsom, mix and let rest for 10 minutes, 2grams of part B, mix, and then 1.2 grams of MKP. That is for the first 3 weeks of flower. Then I will switch back to the original recipe for the duration, unless the plants seem to complain about something.
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Great info. I will go ahead and check out @Hellraiser and @AfgVet grows and see what I can learn from them. Thanks for responding!
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I also use Jacks but I add silica and hydroguard cause I’m in hydro.
I mix:
1/4 tsp /gal Silica
3.69 gr / gal Part A
1.2 gr / gal Epson Salt
2.44 gr / gal Part B
1/2 tsp / gal hydroguard
The PH the water.
Seed to harvest. Several ways to run Jacks, you have to figure out what works best for you…
Good luck! 
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Thank you!