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    Grow Gear

    $65.00 $45.50

    PeakBoost is organo-mineral phosphorus booster that improves blooming processes and stimulates the production or proteins, plant hormones and vitamins. Phosphorus is needed in higher quantities during the initial stages of fruit and flower development.

    Phosphorus tends to get locked up in the growing medium and become unavailable to plants. This results in deficiencies and mineral antagonism in the medium. By combining with organic L-amino acids, the phosphorus is buffered and protected from these mineral interactions. This ultimately means you can use far less fertilizer input and achieve the same or better results.

    PeakBoost is a better option than many combined P/K boosters because it allows the targeted application of phosphorus when and where the plant needs. Often when P and K are added in high quantities at the same time, one or the other remains unused in the medium. This can cause antagonism, chemical binding, and nutrient lockout.

    PeakBoost contains organic acids that can help to adjust pH-down for your nutrient mixture. PeakBoost is 100% soluble in water and doesn't leave residue in reservoirs and irrigation systems.

    Why Use PeakBoost

    • Provides high levels of natural bioavailable phosphorus during the early generative and bloom stages
    • Minimizes antagonism and lockout of phosphorus with other nutrients
    • Powerful stimulating effect on the blooming process
    • 100% water soluble and organo-mineral leaving no residue

    How to Use PeakBoost

    Add PeakBoost to your reservoir every feeding from the second week to the sixth week of the flowering stage. It's okay to extend or shorten the usage of PeakBoost based upon the total flowering time of your specific plant.

    When mixing with any calcium supplements (like MassBoost), be sure to allow one to mix in the solution before adding the other to minimize the formation of calcium-phosphate bonds, which renders both unavailable to the plant.

    Customize your feeding schedule with the Aptus Nutrient Calculator


    • Organic Nitrogen provided by L-amino acids promotes robust vegetative growth and photosynthesis without risk of burning or overdose. Read more on L-amino acids under Core Product Technologies.
    • Full spectrum organic L-amino acids provide growth materials, plant and microbe bio-stimulation, and boost beneficial bacteria populations.
    • Phosphorus stimulates the production of hormones, vitamins, L-amino acids, and enhances protein synthesis in the plant
    • Phosphorus stimulates bud formation, bud set, fructification and bud development
    • Phosphorus is an essential part of the photosynthesis and respiration processes
    • Nutrients are chelated using organic L-amino acids

    PeakBoost Key Ingredients

    • L-amino acids, which provide organic nitrogen (N)
    • High concentrations of natural phosphorus (P)

    Tips from the field

    • Increase PeakBoost dosages throughout the bloom cycle for even better results (see Extreme Feed Schedule)
    • PeakBoost has acidifying characteristics and can be used as a natural pH-down
    • Extend or shorten the usage of PeakBoost based upon the total flowering time of your specific plant


    Available Phosphate (P2O5) Phosphoric Acid 14%

    Urea Nitrogen (N) Urea 1.0%

    Returns Policy

    You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

    You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

    If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


    We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

    When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

    Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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