Greenleaf Nutrients and MEGA CROP happy to be on RUI!

Discussion in 'Rollitup Advertisers' started by GreenleafNutrients, Jul 28, 2017.


    rkymtnman Well-Known Member

    that crossed my mind. i didn't think 3 drops would bump it up that high to be honest.

    i think greenleaf wanted to see if the pH remained stable with the brand of pH up I'm using..
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    DesertHydro Well-Known Member

    gonna start using my sample bag shortly. it will be going head to head against jacks. may put some mammoth p in the mix for shits and giggles. are you guys based out of SD? id like to do a tour lol

    GreenleafNutrients Well-Known Member Rollitup Advertiser

    Hi Desert

    Yes, we are based in San Diego, near Bonita (south area). We don't really have a public area, its more like storage and warehouse and shipping center for now. If you want to save on shipping, we would be happy to accommodate a local pickup.

    rkymtnman Well-Known Member

    ok, 48 hrs later pH is 6.88.

    so began at 5.19 with RO water, 3 drops GH pH UP at 9.68 and 48hrs later at 6.88

    thoughts? @GreenleafNutrients
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    GreenleafNutrients Well-Known Member Rollitup Advertiser

    So, right now its either something in the water, or the PH UP that could be the issue. (because those are the only 2 ingredients)

    To find out exactly what it is, you could do the same experiment, except instead of 3 drops pH UP, use 3 drops GH pH DOWN. If there is no drift using the pH DOWN, then you can conclude that the pH UP is the problem. If there is also a drift using this, then it could be something in the water.

    However, based on your experienced with MAXICROP, using pH DOWN and holding steady pH, then we can make an educated guess right now that its the pH UP fault.

    I do not know this the batch/bottle is old or bad, or maybe that is their intended result? I never used GH pH UP so I can't tell if this would always happen. I suspect that its not the intended results. I have heard of sometimes companies using organic PH adjusters, based on citric/organic ingredients, however the problem here is that bacteria will break down the organic material over a period of days, so they usually lose effectiveness. Thats why its generally not recommended to use organic PH adjusters.

    But right now its looking pretty certain that its the pH UP that is the common entity.
    rkymtnman likes this.

    rkymtnman Well-Known Member

    i do know that it is quite old as i hardly ever use pH UP. next time i'm in town, i'll check what other brands of pH UP are available and maybe just try a different brand.

    i will do the same with the pH down just to see.
    GreenleafNutrients likes this.
    Carolina Dream'n

    Carolina Dream'n Well-Known Member


    Ph down is phosphoric acid.
    Ph up is potassium hydroxide.

    Way more concentrated and cheaper than GH.
    GreenleafNutrients and rkymtnman like this.

    rkymtnman Well-Known Member

    thanks. i'll have to check that out.
    GreenleafNutrients likes this.

    rkymtnman Well-Known Member

    let me ask a question since i was under a different impression. i always assumed that the "job" of the pH up or down product was once the nutes and water get mixed together to set the pH at a desired level. then it was the "job" of the pH buffers in the nutes to keep the pH at that level. is that not correct?

    one thing i did realize is that if i use half well, half RO my pH is in range before i even add nutes. i'm gonna mix up a batch of MC using half and half and see how the it acts.
    ChaosHunter and cat of curiosity like this.

    suthrngrwr Well-Known Member


    Seoulstice New Member

    @GreenleafNutrients I've been debating on purchasing your product compared to Jack's Pro and am really interested in the all-in-one application of your product. One thing I'm currently stuck on is the feeding calculator on your site shows for a 200gal reservoir the amount needed. When I apply the listed amounts on the ppm calculator, it's showing around 500ppm. In my experience, that seems really low. Just wanted to confirm that is the correct amount before purchasing.

    Additionally, I am running rockwool blocks and wanted to see if your product is compatible.

    mackdx Well-Known Member


    If one was running Blumats with Megacrop, what would you suggest for feed rates, since plants are being continuously fed.

    Any tips or tricks?

    GreenleafNutrients Well-Known Member Rollitup Advertiser

    There are some natural PH buffers that most hydroponic nutrients will have, but the only product I know that specifically does additional PH changes with chemical reactions is the Advanced Nutrients "PH Perfect" type products. Those products will have extra chemicals in them, and try to force the range towers 6.0 area. You have to use RO water though, and there is also the trade off of the additional chemicals used to do the additional PH changes

    PH up is like usually in range of PH 10 or 11, and PH down is something like PH 4.0. So PH down lowers PH, and PH up raises PH. Most good hydro nutes will stay stable once they are mixed and not fluctuate or drift after that.
    ChaosHunter likes this.

    GreenleafNutrients Well-Known Member Rollitup Advertiser

    Yes, fully compatible with blocks.

    Elemental PPM and measured meter PPM are different concepts. You can use a similar dose to jacks + Cal Mag. So if you were using 6g total of Jacks + Cal Mag, you can use 6g MEGA CROP as a starting point. You can make changes later as needed to raise or lower based on how the plant reacts.
    You can use the standard feeding calculator with Blumats

    With continuous drip, you are giving small doses more often. So I wouldn't change the feeding amount overall compared to other feeding methods that give bigger doses less often. Just when starting out, keep an eye on the plants and if they look over or under fed you can make small adjustments.
    mackdx, TCH and ChaosHunter like this.

    ChaosHunter Well-Known Member

    With the PPM's of Mega Crop you have to understand that all the additives and supplements add to the PPM's. The amount of money saved not having to buy these products to add to a Primary, Secondary and micro base is nice.

    There are some nice base nutrients out there in dry form though.
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    a mongo frog

    a mongo frog Well-Known Member

    Are you adding any cal mag or any other additives? Or are you only adding MegaCrop base?
    ChaosHunter likes this.

    GreenleafNutrients Well-Known Member Rollitup Advertiser

    check out ingredient list here. There is lots of Cal and Mag already in. There may be some cases where you would have to add more in, but I think it would be pretty rare!

    6.5% Ca and 1.9% Mg is more than Cannabis needs, so there is leeway for mediums like Coco already factored in

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    ChaosHunter Well-Known Member

    My test grow is nothing but Mega Crop, Tap Water "40 PPM" and PH adjustment and nothing else. Every Nutrient I've used up to this point required additives and/or supplements.

    I wanted to see for myself if Mega Crop could stand on its own and it has so far. I journal the test if anyone who is interested can see the proses.
    T-Time and HydroRed like this.
    a mongo frog

    a mongo frog Well-Known Member

    Yea I've seen your garden. The color is absolutely beautiful.

    HydroRed Well-Known Member

    I just transplanted a table of cuts using only Mega Crop in Hydroponic F&D table. It dissolves great, and seems to buffer the pH well. I use tap water at 115ppm and a pH of 6.8. Im following the feed schedule listed on the site for "Flower wks 1-2":

    50g of Mega Crop for a 10 gal res brought the ppm to 760.
    The buffers seem to work well since it took the tap pH of 6.8 down to 6.2 in about an hour.
    I think the ppm chart on the site may be a quite light for actual ppms though.
    It says my PPM should be around 455 but I'm actually at more around 630 (748 minus the 115 from tap).
    Im documenting the grow at the link in my sig if anyone cares to check out a hydroponic grow with this nutrient.
    Last edited: Nov 19, 2017

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