Originally Posted by TommyTwoColas

For those using Jacks straight through with no boosters, do you adjust your ratios as flowering winds down? I.e., less calcinit and more of the Jack's "base"?

Also wondering (for those who use additives), what change if any they make to the base formula when using said additives. Am going to do a heads up of Jacks (straight through, run at 1/2 tsp/gallon of each) vs. the same base + Big Bud and Overdrive.

Conditions are identical for each group, the addition of Big Bud and Overdrive will be the only variable.

Thanks.

that is exactly how you achieve a Mg deficiency with Jack's...it already has the upper limit of K in it, add a PK booster and you end up with so much K you lock out Mg. and then the tail chasing begins

Jack's is absolutely not designed to be used with a bloom booster

It is also not designed to be used with high alkalinity water...I would not recommend it for water over say 30 ppm alkalinity

check out the formulas guys use to grow absolute monsters outside...they have less K than Jack's

[TommyTwoColas]

YS, thanks for checking in - have followed your grows at a few different sites (and have been meaning to get some of that Calcum-25 for some time now).

So, long story short - don't bother trying to add any bloom boosters to Jacks? Sure seems like that's what you're trying to say but I just want to make sure I'm understanding you correctly...............so you don't adjust your formula at all to where you are in flowering?

Thanks,
Tommy

Do not add a PK booster to Jack's. K is important for bud formation but enough is enough and Jacks has as much as you will ever need.

It is about the balance of minerals...get that right and you can push a little or go light and pretty much get the same result...except the light feed will be healthier and the smoke will taste so much better.

Every time you jack the EC up you cut transpiration of the plant...which totally dictates the uptake of Ca and Boron and it just so happens the uptake of Ca is the single most important thing to your plant.

And that is why I believe additives are a horrible, horrible idea...the nute companies would be doing you a favor doubling the price of their base nutes and stopping all of those fucking snake oil additives

At least that is the way I see it...I am sure others will have different opinions.

[dubwise]

I switched over to jacks a while ago and find it to be much easier to work with, and a lot cheaper. I use 1tsp/gal w/ 3/4tsp calcnit all the way through and have no problems with any deficiency. So glad this place taught me about jack's!

[cheeched]

Just ordered Jacks Hydro 5-12-26 and calcnit..Can't wait to try it out..

[Jabapc]

a quick note after the first grow..I went with Jacks at the recommended 3 grams jacks 2 cal nit with just 5 ml protect added.. no weight as things were just cut down but there was a problem with this grow using the Jacks .. the buds got big enough that some plants fell over branches broke some in more than one place it was a mess lol but even that didn't stop them I tied things back up and finished the grow

Originally Posted by Jabapc

a quick note after the first grow..I went with Jacks at the recommended 3 grams jacks 2 cal nit with just 5 ml protect added.. no weight as things were just cut down but there was a problem with this grow using the Jacks .. the buds got big enough that some plants fell over branches broke some in more than one place it was a mess lol but even that didn't stop them I tied things back up and finished the grow

Try it without the protekt and I promise you will be happier. I know it is called silica but it is potassium silicate...the Jack's absolutely does not need extra K

[Jabapc]

will try that next time thanks YS

[Jabapc]

is there anyway to add silica without Potassium

[HG23]

YS,

I have been using full strength Jacks for the past couple runs and about mid way through flowering I start to see symptoms of calcium deficiency (rusty spots) and leaf tissue necrosis that seems to start at the leaf tips. I use Roots Organics soil in one room which has it the worst and my other room with coco only has it slightly. My water was tested at 59 mg/L CaCO3, do you think the high alkalinity could be causing a problem?