Shogun PK Warrior 9/18

The smarter PK ratio for explosive flowering

  • Dilution rate: 0.5ml/L
Product Info
Available in 250ml | 1L | 5L | 10L | 25L
Adjust Base Feed Reduce bloom nutrients by 25–50% to avoid overfeeding.
Mid-Flower (Week 4-7) Add 0.5 ml/L to nutrient solution. Use up to 1.0 ml/L in the first week for a stronger push.
Transition Stop PK Warrior 9/18 before switching to Dragon Force in the final ripening phase.8
Feeding Method Add directly to your tank; maintain pH 5.5–6.5. Works in soil, coco, and hydro.
Complimentary Product Pair with Sumo Active Boost for maximum floral response, and Shogun Silicon/ Shogun CalMag to support heavy flowers.

PK Warrior 9/18: The Gold Standard of PK Boosters

PK Warrior 9/18 isn’t just another PK booster — it’s the perfect ratio for bloom success. Engineered with a 9/18 phosphorus–potassium balance, this formula delivers the exact levels your plants crave in mid-flower. Add in its ultra-high concentration and exclusive SmartZEN technology, and you’ve got more than nutrition — you’ve got a weapon for maximum performance.

The result? Bigger, denser flowers. Stronger structure. Richer resin and essential oils. PK Warrior 9/18 is the ratio that pushes your plants harder when it matters most — giving you explosive yields and unforgettable aromas.

Why Growers Choose PK Warrior 9/18

  • Optimised PK ratio — 9 /18 phosphorus–potassium balance that outperforms the old 13 /14 ratio, delivering size and density without excess P (phosphorous).

  • Concentrated strength — Just 0.5 ml/L goes the distance, making it up to 3× more efficient than typical PK boosters.

  • SmartZEN powered — Our exclusive bio-tech improves nutrient uptake, stress resistance, and root health for higher yields.

  • Sulfur-enriched — Supports protein synthesis, aroma, flavour, and essential oil production in flowers.

The Science Behind Bigger Blooms

Plants in mid-flower need targeted nutrition to sustain growth and push out premium oils and resins. PK Warrior 9/18 delivers the precise phosphorus–potassium balance your crop can actually use, fuelling flowers with the right nutrients at the right time for superior weight, flavour, and quality.

Why Ratio Matters in Flowering
  • Potassium drives yield — Higher potassium levels produce larger, denser, heavier blooms, directly impacting final yield and crop quality.
  • Phosphorus supports — Essential for energy and flower initiation, but only up to an optimal level. More isn’t better once demand is met.
  • Balance drives uptake — The correct ratio ensures nutrients are absorbed and used efficiently, supporting peak flowering performance.
  • Not all PK ratios are equal — Formulated for flowering crops — not general agriculture — PK 9/18 matches real plant demand.
The Shogun Advantage
  • Formulated by Dr Callie Seaman PhD — 20+ years of plant nutrition expertise behind every ratio.
  • Balanced PK ratio — Avoids phosphorus overload and protects beneficial microbes.
  • Proven performance — Backed by grower trials across hydro, coco, and soil.
  • Range synergy — Designed to work seamlessly with Sumo Active Boost, Shogun Silicon, and Dragon Force.

  • Shogun Product Catalogue - Download
  • Shogun PK Warrior 9/18 Material Safety Data Sheet - Download

Feedchart Calculator

Generate a personalised feeding schedule based on your grow setup.

1

Nutrient line:

Select Samurai Coco, Samurai Hydro or Samurai Terra.

2

Tank size & unit type:

How much solution do you need to mix? Enter your tank size.

3

Water type: i

Are you using water straight from the tap, or R/O water?

"Hard" and "soft" are terms used to describe the quality of many water sources. Hard water has a high mineral content, which can cause hard, white lime scale to form on surfaces and growing equipment. Hard water may also have a high alkalinity and a high pH, meaning that considerably more acid is required to lower the pH in the hydroponic system to ideal levels. Soft water, by comparison, is a low mineral water source. Often rainwater is ‘soft’, while municipal water sources across the country range from very hard to soft, depending on where the individual city water supply is taken from. Other water types Some growers prefer to start with water which has been pre-treated to remove any chemicals, pathogens and other contaminates. RO (reverse osmosis), distilled water, filtered and bottled water are all options for small growing systems and those concerned with water quality. To understand your water type, simply immerse your EC/CF meter in your background water, read the display and select the applicable 'water type' or enter your own 'Custom' value.
4

Schedule type:

How aggressive do you require your schedule to be? Select Light, Standard or Heavy Feeding

The grow room environment strongly influences the water and nutrient uptake of your plants. Please select your feeding type from the information provided below.<br><br><ol><li>Light feeding for grow rooms where the leaf temperature is consistently above 25°C and the relative humidity is below 50%.</li><li>Standard feeding for grow rooms where the leaf temperature is consistently below 25°C and the relative humidity is above 50%.</li><li>Heavy feeding for grow rooms with LEDs and/or for closed-looped grow rooms utilising 'active cooling' with the injection of CO2.</li></ol>

Shogun PK Warrior 9/18

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