Advanced Nutrients HammerHead - Powerful PK for Late Flower Advanced Nutrients HammerHead is a powerful PK booster that delivers exactly what your plants need during the mid-to-late flowering stages. With its 0-4-12 NPK formula, it pushes plants to develop bigger, denser, and more resinous flowers—without throwing your feed balance out of sync. It’s pH Perfect and fully compatible with the rest of the Advanced Nutrients line. HammerHead is specially formulated to work with the Sensi Terra™ Series base nutrients. It’s also fully compatible with all Advanced Nutrients pH Perfect and non–pH Perfect base nutrients, as well as other brands' base nutrients and supplements. Please Note: The 5 Litre Hammerhead is purchase to order, so slightly extended lead times will apply. Why Choose HammerHead? Ideal PK Ratio (0-4-12) – Encourages dense bud growth and flower stacking pH Perfect® Technology – No pH pens or adjusters needed No Nitrogen – Perfect for flowering phase without excess leaf growth Clean Formula – Fully soluble and won’t clog drippers or lines Tailored for Advanced Systems – Works especially well with coco and hydro More Than Just a PK Booster Most bloom boosters copy generic agricultural formulas — fine for field crops, but not for high-value plants. HammerHead is different. It delivers a precise 1:3 PK ratio that encourages heavy, dense flowering without overloading your root zone with phosphorus. It uses potassium citrate instead of sulfate of potash, improving uptake without causing toxicity. And because it contains no nitrogen, there’s no risk of leafy growth or nutrient imbalance late in bloom. Pair it with Advanced Nutrients’ Sensi Terra™ Series for even better results, or drop it straight into your existing feed schedule with zero fuss. How to use Advanced Nutrients HammerHead Add HammerHead during weeks 3–7 of flower alongside your main nutrient at 2ml per litre; it pairs perfectly with Big Bud early in bloom and Overdrive to finish. No pH adjustment needed if you’re using other Advanced Nutrients products. To see the full Advanced Nutrients range, click here
