Phosphorus Booster

Regular price$32.00
Tax included.

Phosphorus booster and flower site initiator.

Peakboost is an ultra-concentrated, fast acting, phosphorus booster and flower site initiator designed for use in early to mid-flower. Great for shooting and setting flowers, Peakboost gives you total control by allowing you to moderate the amount of phosphorus based on the flowering cycle of a particular cultivar.  

Available Sizes

    Feed Programs

      Feeding Type and Amount

      Regular feeding
      0.1 ml – 0.3 ml per 1L

      Foliar spray (maintenance)
      2 ml per 1L

      Foliar spray (repair)
      4 ml per 1L

      Add PEAKBOOST to your reservoir every feeding from the first week to the fourth week of the flowering stage. It is okay to extend or shorten the usage of PEAKBOOST based upon the total flowering time of your specific plant or by the preferences of each individual cultivar.

      When mixing with any calcium supplements (like MASSBOOST or MINERAL-CALMAG), be sure to allow one to mix in the solution before adding the other to minimise possible lockout.

      Peakboost is an ultra-concentrated, fast acting phosphorus booster and flower site initiator designed for use in early to mid-flower. This Potassium free formula is extremely bioavailable making it the perfect shaping tool for small and large scale cultivators.

      The dosage strength and application duration can be easily customised to match the characteristics and overall flowering duration of each unique strain.

      Using a potassium free phosphorus booster allows you to individually supplement the macro-element (P) to suit the preferences and metabolism of your plant genetics.
      PEAKBOOST can be used as a standalone phosphorus booster at any stage of growth.

      Provides high levels of natural bioavailable phosphorus during the early generative and bloom stages.

      Minimises antagonism and lockout of phosphorus with other nutrients.

      Powerful stimulating effect on the blooming process.

      100% water soluble and organo-mineral leaving no residue.

      L-amino acids which provide organic nitrogen (N).

      Phosphorus Crucial to the capturing of sunlight into usable forms of energy within the plant.

      Gradually increase PEAKBOOST dosage throughout the bloom cycle until your flowers are well set and ready for bulking. It is ok to start FINALEBOOST transition later on plants with longer maturation periods.

      Should you see purple colouring or streaks on the petioles (the stalk that joins the leaf to the stem) of your plants in the vegetative stage of growth, add PEAKBOOST to your veg feeding mix at the rate of 0.25 ml per litre to correct the deficiency. Alternatively, you can foliar spray PEAKBOOST at the rate of
      2 - 4 ml per litre.

      Note: Always raise or dim your lights before foliar spraying your plants.


      PEAKBOOST is an extremely concentrated phosphorus booster that’s made more effective by the chelation of L-amino acids. While some cultivators still use Peakboost at 0.5ml per litre or higher, for most cultivars it’s simply not needed in any higher dosage than 0.3 ml per litre.

      Yes, you can extend the use of PEAKBOOST for longer flowering cultivars. For 10-12 week cultivars you would typically extend week 4 of the feed program for an additional week, and then do the same for week 6.

      Feed Programs


      This program is the easiest, most concentrated, low cost program on the market. The pH stability is so reliable you can mix and set your reservoir on a given day and it will read exactly the same (+- 0.05) seven days later with no adjustment in between.


      This program is the absolute gold standard of quality, flavour, oil production and shelf life. This is the program for the grower looking to produce the absolute best flower they can or any extraction artists looking to increase the quality, colour and yield.


      Access to the OG programs that include Soil PRO and Soil BASIC.

      All of these programs are available for download.

      Faster, Healthier
      Root Development

      Thicker, Stronger

      Higher Quality
      Fruits & Flowers


      Superior Flavour

      Increased Bag