Shogun Samurai Hydro Bloom A&B — Premium Two-Part Hydroponic Bloom Nutrient
Best for: Intermediate to advanced hydroponic growers wanting proven results without the guesswork of mixing three-part systems
Our thoughts
This is proper kit for serious hydro growers. Shogun's SmartZen technology is genuinely different — it's not just marketing noise. The fact they've built hard and soft water versions shows they actually understand UK growing conditions. Two-part simplicity with real yield performance. One we recommend a lot for growers stepping up from basic nutrients.
Shogun Samurai Hydro Bloom A&B is a premium two-part hydroponic bloom nutrient engineered for the flowering stage of your growing cycle. It's formulated with SmartZen, a proprietary compound that improves how your plants absorb and distribute nutrients through their vascular system, delivering up to 8% higher yields than standard NPK formulas. Available in hard and soft water versions, it's built specifically for UK growers and works cleanly across any recirculating or drain-to-waste hydroponic system.
How it compares
Two-part hydroponic nutrients sit in a sweet spot between simplicity and control.
-
vs. one-part systems: More micronutrients and flexibility. Better for serious yields
-
vs. three-part (Flora, Advanced): Simpler mixing, less guesswork, same proven results
-
vs. generic hydro nutrients: SmartZen technology and water-hardness specific formulations give measurable edge
The hard water version is a genuine differentiator — most brands sell one generic formula. Here you get a formula that accounts for UK tap water, lowering pH and reducing surplus calcium and magnesium that can lock out other nutrients.
Usage guidance
Basic dosing
Add 2–4ml of part A and 2–4ml of part B per litre of water. Mix each part separately into your reservoir, stirring between additions. Target EC range of 1.3–2.5 mS/cm and pH of 5.5–6.5.
For recirculating systems (DWC, NFT, flood and drain)
Mix to strength and run continuously. Monitor EC and pH twice weekly. Shogun pairs seamlessly with additives like PK Warrior or Sumo Boost if you want extra floral impact in weeks 4–7.
For drain-to-waste setups
Run 10–40% runoff daily depending on your media. Keep nutrient concentration stable by monitoring runoff EC.
Week-by-week note
The standard 9-week flowering schedule stops Bloom feed in week 8. Final week is water only. This keeps nutrient loading light at harvest.
Hard vs. soft water
Check your postcode online — under 100mg/l calcium carbonate is soft water, over 120mg/l is hard. Choose accordingly. Hard water version is formulated to prevent nutrient lockout in high-calcium tap water.
Technical specifications
-
Product type: Two-part liquid hydroponic base nutrient
-
Growth stage: Flowering (weeks 1–8 of bloom cycle)
-
NPK ratio (combined): 4.1 - 3.5 - 6
-
Dosage: 2–4ml of each part per litre of water
-
Target EC: 1.3–2.5 mS/cm
-
Target pH: 5.5–6.5
-
System compatibility: All hydroponic systems (DWC, NFT, flood and drain, drip)
-
Active ingredient: SmartZen nutrient uptake technology
-
Pack sizes: 1L, 5L, 10L, 25L (A and B sold separately or as kits)
-
Formulations: Hard Water (HW) and Soft Water (SW) versions available
Who this is for
- Intermediate hydroponic growers ready to move beyond basic one-part nutrients
- Growers in hard water areas of the UK seeking a tailored solution
- Anyone running recirculating or drain-to-waste systems and wanting measurable yield gains
- Growers who value simplicity of two-part mixing over the complexity of three-part customisation
- Those already using SHOGUN additives or keen to build a complete nutrient ecosystem
Our take
Samurai Hydro Bloom is genuinely solid kit. SmartZen isn't snake oil — the yield boost is documented, and the hard water formulation shows Shogun actually thinks about UK growers instead of just selling a generic global product.
If you're running decent hydro kit and want results that justify the setup, this is worth picking up while stock lasts. Two-part keeps things clean and simple, the tech works, and you're not paying premium brand tax for the privilege. Does exactly what it should, week in, week out.
