Shogun PK Warrior 9/18

The Ultimate PK Ratio

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.

How to Use Shogun PK Warrior

	Add water Start by adding a measured amount of water to your tank, reservoir or watering can.
	Shake PK Warrior Bottle Give PK Warrior a quick shake before use.
	Add 4ml per litre of PK Warrior to your tank Always follow feedcharts, but as a general rule, mix 0.5ml per litre of PK Warrior into your solution.
	Stir the solution Using a clean stirring device, carefully mix your nutrient solution thoroughly.
	Ready to use For optimal results, check pH and EC and always follow the feedcharts.

Use our Shogun feedchart calculator for an accurate complete feed schedule.

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 Sulfur Matters for Flowering

Protein builder — Creates amino acids and enzymes that drive metabolism and growth.impacting final yield and crop quality.
Aroma and oil driver — Boosts essential oil and terpene production for stronger flavour and scent.
Resilience support — Strengthens plants under the high demands of peak flowering.

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

FAQ About PK Warrior

Feedchart Calculator

Generate a personalised feeding schedule based on your grow setup.

Nutrient line:

Select Samurai Coco, Samurai Hydro or Samurai Terra.

Tank size & unit type:

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

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.

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>

Product	Cuttings & Seedlings (mL)		Vegetative Growth (mL)				Flowering Growth (mL)								Final Week
Product	1	2	1	2	3	4	1	2	3	4	5	6	7	8	Final Week
Shogun Start			-	-	-	-	-	-	-	-	-	-	-	-	Water Only
Katana Roots
Samurai Coco A
Samurai Coco B
Samurai Coco B
Samurai Coco B
Zenzym
Shogun Silicon
Shogun CalMag
Sumo ACTIVE Boost
Geisha Foliar
PK Warrior 9/18
Dragon Force
Target Conductivity*

Summary

How To Use

DO NOT premix concentrated products. Always add to water.
Premix Silicon in 5L of water and pH adjust to approximately 6.5 before adding to your tank/reservoir.
To maintain 'Mother' plants for up to 6 –12 months, continue to follow the 'Week 4 Vegetative Growth' schedule.
The changeover from 18 to 12 hours varies depending on the plant specie's growth characteristics. The rule of thumb is to change the light period from 18 hours (vegetive growth) to 12 hours (flowering growth) after 2 weeks or after the plants have grown half the distance from the initial plant spacing length.
Reduce hours of light if ripening goes too fast. Watch out for increasing Relative Humidity.
Recommended pH is between 5.5 - 6.5.
During vegetative growth and the first 4 weeks of the flowering growth, the pH will rise as the plants uptake nutrients. Reduce the pH of the nutrient if the pH rises above 6.5 with pH Down.
During the second half of the flowering growth, the pH may reduce. Adjust the pH with Shogun Silicon or with pH Up if the pH reduces below 5.5