Jack's Classic /JR PETERS (Don't waste money on anything else)

Discussion in 'Nutrients' started by SheepsBlood, Mar 31, 2017.


Do you already use Jacks?

  1. Yes

  2. No

  3. I wish

  4. I like to overpay for fertilizer and pay for water in a bottle

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    ttystikk Well-Known Member

    Yep. Experience counts!
    homebrewer likes this.

    SheepsBlood Well-Known Member

    I see why now... I would have to drive an hour to get 25lb bags of anything. So, ordering online is the same cost for me and more convenient.

    ttystikk Well-Known Member

    I drove 2 hours but it was still a lot cheaper. I got enough to last me for years.
    Bakersfield and homebrewer like this.

    ruwtz Well-Known Member

    I run 5-11-26 and a bunch of other dry salts in coco drip dtw under Gavita 750DE's and my Larry OG pips 2lb/light.

    Thats 1.2 grams per watt on an 8 week veg.

    I'm not even that experienced.

    Currently end of week 6:


    I also run perpetual, harvesting half my room once a month. Thats 2 lights, 8 plants total, every four weeks.

    This ain't voodoo. Dry salts in a balanced nute profile have EVERYTHING A PLANT NEEDS.
    thumper60, Bakersfield and ttystikk like this.

    SheepsBlood Well-Known Member

    Looks great... Do you know what Vapor pressure deficit is?
    Because those girls look like there is a serious imbalance in the force going on there and I'm betting that's what it is.
    Also, your 2+ lbs is greatly attributed to your ScROG. I can't do that in a Perpetual garden in ebb n flo buckets.
    I have more than 2 plants.
    Wait a sec, you are only harvesting 2 at a time in a perpetual. Do you have a bunch in VEG waiting to go into flower? I ask because I can't see how that would be possible to yield 1lb per plant each month without some extended VEG time.
    I am not calling you out, I am asking because I would love to learn how you do it. SERIOSULY
    Bakersfield likes this.

    ruwtz Well-Known Member

    Thats two tables at a time, not two plants. 4 plants to a table so 8 plants per month, maxing at 4lb. Thats 8oz+ plants, which isn't hard.

    I veg on the overlap so 8-9 weeks they are ready to flip into the empty tables. Its all in the planning.

    And yes i've ran VPD to the numbers and it doesn't work for me. At 83F (with CO2) i'd need 70%+ RH and thats just no good for nobody. Those charts everyone talks about are for leafy veggies, not this arid plant of ours.

    MY actual canopy RH is between 50-60%. I run a Quest 205 dehu and that beast is very hard to control, even with a humidistat in-line. It just wants to dry my small 200sqft room completely and doesn't hold back. I'd say its too big for my space, actually, but incredibly efficient.

    I believe my leaves look as they should for week 6/7 on 8 week strains. Some purpling from cool night temps and beginning to age from all the hard work.

    I get the results so happy with the setup, even though we know everything can always improve. I don't call this dialed-in by any means, just countering the posters' point that dry salts couldn't hit good numbers.

    I don't know anything and i'm doing it.
    ttystikk likes this.

    ruwtz Well-Known Member

    FWIW, when I was meddling with plant count numbers per table I hit 14oz from one solo plant which I was impressed/surprised by. Then I ran two plants per table and got 20oz between them. Finally decided on four per table to get 32oz and more.

    Factoring in light footprint, light intensity and crossover, scrog / canopy spread etc it became apparent that it is not a multiplier situation; ie. one plant 13oz so 4 must equal 52oz. Not the way it works.

    I've also experimented with pot size and landed on 3gal being sufficient, 5gal better if veg time is extended beyond the planned 8 weeks or the plant roots particularly vigorously (and I do see some variation here even in the same pheno). My observation is that bigger doesn't seem to be better with this veg + bloom time and only uses up more medium and watering. Its an area I can economize on, together with cost-efficient fertilizers like we are talking about.
    Last edited: Apr 6, 2017
    ttystikk likes this.

    SheepsBlood Well-Known Member

    I agree with you about VPD. Though, one strain I had (ECSD) had issues with it being in the 50% range. I never had that issue before and when I was researching it, that's when I found the VPD issue. About 2 years ago.

    Since then I haven't had an issue. I think my issue actually was more related to light intensity. I had those OG square style reflectors. They do some seriously deep focus penetration.
    I switched out reflectors this past year to those XXL style wide ones. I say it like that because they are not brand name.

    SheepsBlood Well-Known Member

    I would like to see your setup. Maybe after my summer harvest this year, I could switch over to your method. I would love to only have to tend to a few plants rather than having to deal with so many.

    thumper60 Well-Known Member

    wheres the trics, looks like u run pgrs

    ruwtz Well-Known Member

    I run salts and a couple of biostimulants only: Hydroguard + Recharge. Have been trialling Mammoth P but don't consider it anywhere near essential.

    Number one reason for my yielding is without a doubt lights. Gavita 750 DE's ramped up and footprint overlapping perfectly in this 9 x 12ft room. Light is the limiting factor every time.
    ttystikk and Bakersfield like this.

    Bakersfield Well-Known Member

    I'm really considering buying a few of the 750's real soon and putting down my single Ender's.
    What kind of coverage do you get from them? I read they'll cover a 5x5 well but it seems weird when I hear the 1000's cover a 4x6 most efficiently.

    jonsnow399 Well-Known Member

    I think any de footprint is gonna be more rectangular than square.

    ruwtz Well-Known Member

    Nope. Never have, never will.
    ttystikk likes this.

    WayneH5565 New Member

    Just like to add, I use Jacks hydro and a generic cal nit with RO water. Works perfectly. My first round I used pure RO and had deficiencies like crazy. Now I add in about 5 gal of my well water pre softener to about 45 gal of RO. Better stabilization. The mix comes out at 5.8-5.9PH. I’m using promix plus extra perlite. No way I could afford GH or some other bottled nutes for 50 gal of water. I get the big bags of jacks and a big bag of cal nit. Will last forever. Don’t know why people spend of expensive nutes. Maybe it makes sense for small grows.
    ttystikk likes this.

    jonsnow399 Well-Known Member

    I just got two bags, do you mix by weight or by volume?

    ttystikk Well-Known Member

    By mass. Use a gram scale.

    ttystikk Well-Known Member


    They buy the pretty bottles because they don't know any better.
    Cold$moke likes this.

    Cold$moke Well-Known Member

    Hey tty,
    sorry to hijack but what would your opinion be on the hydro garden 4-20-39 mix plus cal nit anything else? Im ready to go for pure salts just trying to find a good base profile
    Olive Drab Green

    Olive Drab Green Well-Known Member

    What happened to the circular vertical setup? Beautiful plants, by the way.

    @RM3 uses Jack’s Citrus, I believe?
    ttystikk likes this.

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