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Mono potassium phosphate

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    Mono potassium phosphate

    Hi guys, looking for someone that uses mono potassium phosphate ,i think its 0 52 34 as a bloom nutrient.
    my plants are outdoors in the ground and i have this and potassium sulfate on hand. Anyone know how much per gallon of water or any info on using these ? Thanks so much

    Try between 1ml to 4ml per gal starting at the lower range as flowers appear increasing over the next few weeks to 4ml. Watch for yellowing tips and edges. Overdoing phosphorus tends to lock out other nutes. Too much can appear to be too little so slowly does it. You won't need much
    Flower Room: 11' x 7' x 7.5'H, 480w AC, 13gal/day dehumidifier, 1.5gal ultrasonic humidifier, 60gal (27gal usable) nute tank, 16" pedestal fan & 18" wall fan. Lighting and climate automated. Hand watering.
    Veg Cupboards: ​​​​​​Two 4x2x6H cupboards. SF2000 Evo in each. Climate controlled and automated. Hand watering
    Aeroponics Low Pressure Bucket: 20W LED. 5 clones
    Lights: 2 x SF-7000, 2 x 30w 660&730nm supp. red boosters for flower stretch over sativa x in flower room.
    Medium: Coco/perlite, mix of 13gal & 7.2gal pots, no drains
    Current Grow: ​​​4 x Autos Franklin's AK47 x Red CBD (harrvested dry 22oz), 1 x Photos Franklin's Orange Zkittles x Sour Diesel, 1 Franklin's White Widow x Sour Diesel, All feminised. 1 x sativa x, regular, Clones 30th March 5 x Orange Zkittles x Sour Diesel fem in veg cupboards & 3x WW x SD & 2 OZ x SD in Aeroponics bucket.
    Last Grow: 4 x photos, old school, 66 days of veg flipped 25 Feb harvested day 65F 3lb11oz.


      Thanks for the reply, both of these are dry powder


      • Bluey
        Bluey commented
        Editing a comment
        1 gram/gallon and you can start on the flip or wait until flowers start to show.
        .This stuff is the same a bloom boosters only 100 times cheaper.

        Will lower pH

        You would normally switch to the sulphate last 3 weeks or there abouts

      I use it all the time. From week 5 to harvest, but only once or twice a week, don't do it every single watering cause it can build up. It helps with the bulking of the flower but also seems to make the plant finish a bit faster.


        Thanks guys


          I used to use it in hydroponics but i don't use it anymore. It can be considered as KOH+H3PO4. So i use KOH and H3PO4 instead. Using KOH I'm able to dissolve SiO2 and then I'm able to adjust pH of final solutions using H3PO4.

          I don't know soils much but i think the best strategy to feed plant grown in soil with P is by foliar feeding as P in soils is immobile because of calcium apatite low solubility at high pH. Many soils have P much higher than plants need but plant have hard time uptaking P


          • ZiroOne
            ZiroOne commented
            Editing a comment
            I also use K2SO4. it was the main source of K in my nutrient formulation, near the 80% of total K. But I've changed my formulation a lot during these years. I use it much much less than before. Cannabis grown for buds don't need K as much as they need when they are grown for fibers. Secondary metabolism decreases as K increases. High level of S decreases Ca and Mg uptake. So be careful if you want to apply it.
            Last edited by ZiroOne; 07-10-2024, 09:26 AM.

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