Phosphorus Booster

Regular price$20.50

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 specific flowering time of a particular cultivar. 

Available Sizes

    Feed Programs

      Feeding Type and Amount

      Regular feeding
      0.5 - 1 ml per 1 gallon

      Foliar spray (maintenance)
      8 ml per 1 gallon

      Foliar spray (repair)
      16 ml per 1 gallon


      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 minimize 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 customized 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 phosphorus during the first part of the flowering stage. 

      Minimizes antagonism and lockout of phosphorus with other nutrients. 

      Powerful stimulating effect on the initial blooming process. 

      100% water soluble and leaves no residue. 

      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 coloring 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 1 ml per gallon to correct the deficiency. Alternatively, you can foliar spray PEAKBOOST at the rate of 8 – 16 ml per gallon. 

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


      Phosphorus booster and flower site initiator.

      Peakboost is your go-to phosphorus booster and flower site initiator, ideal for early to mid-flowering stages. This ultra-concentrated, fast-acting formula allows for precise phosphorus moderation to suit the specific flowering times of different cultivars, offering unparalleled control.
      Designed for both small and large-scale operations, Peakboost's potassium-free and highly bioavailable solution ensures optimal shaping and setting of flowers.
      Customize dosage and application to match each strain's unique flowering period, providing high phosphorus levels when most needed.
      Experience minimized nutrient lockout and a significant boost in blooming, all with a formula that's 100% water-soluble and residue-free.

      Peakboost FAQs

      PEAKBOOST is an extremely concentrated phosphorus booster that’s highly available to plants. With the introduction of APTUS BASE, we’ve aligned the PREMIUM PROGRAM to have synergy between the phosphorus in both PEAKBOOST and BASE. This has resulted in a lower dosage. Note that the legacy EXTREME PROGRAM is still acceptable if using another base nutrient product.

      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, as well as the Extreme Program.

      All of these are available for download.

      Faster, Healthier
      Root Development

      Thicker, Stronger

      Higher Quality
      Fruits & Flowers


      Superior Flavor Profile

      Increased Bag