Shogun Samurai Terra Grow — Single-Part Soil Nutrient for Vegetative Growth
Best for: Soil growers wanting a straightforward vegetative feed that delivers measurable yield gains without multi-part complexity
Our thoughts
This is a properly formulated soil nutrient built on real science. SmartZen isn't marketing fluff — it's a proprietary bio-stimulant blend that genuinely boosts nutrient uptake and photosynthesis. Single-part feeds save time and confusion, and the 6-8% yield increase over standard NPK formulas is backed by grower trials. One we recommend to growers who want results without the faff of three-part systems.
Shogun Samurai Terra Grow is a single-part mineral nutrient formulated specifically for soil growing during the vegetative stage. It's built with a balanced NPK of 2.2-1.0-5.0, loaded with seven essential micronutrients, and fortified with Shogun's proprietary SmartZen Yield Maximiser — a plant extract and bio-stimulant blend proven to increase yields by up to 8% above standard NPK feeds. Developed in the UK using UK water, it's designed to work cleanly in hand-watered pots, drip systems, and automated setups without blockages or complications.
How it compares
This sits in the premium mineral nutrient bracket for soil growers.
- Single-part simplicity versus three-part systems like General Hydroponics Flora or Fox Farm
- Proprietary SmartZen technology — not found in competitor formulas
- Proven 6-8% yield increase over standard NPK products
- All seven essential micronutrients included; no additional boosters needed during veg
- Higher price point justified by performance gains and reduced feeding complexity
You're paying for technology and results here, not a bargain-basement feed.
Usage guidance
Terra Grow is designed for the vegetative stage, where fast growth and strong structure are the priority. Dosage depends on your water hardness — this matters more than most growers realise.
Hard water areas (higher mineral content)
Weeks 1-2: 1-2ml per litre
Weeks 3-4: 2-3ml per litre
Hard water already contains calcium and magnesium, so dial back slightly to avoid nutrient lockout.
Soft water areas (lower mineral content)
Weeks 1-2: 2-3ml per litre
Weeks 3-4: 3-4ml per litre
Soft water needs the full dose to hit nutrient targets. Check your local water hardness online — it matters.
Application method
Works in hand-watered pots, drip irrigation, and fully automated systems. Mix nutrients one at a time, stir thoroughly between additions. Maintain pH 5.5-6.5 in soil for optimal nutrient availability. Keep the feed cool and above 7°C — colder temperatures can crystallise the solution.
System pairing
Pair with Shogun Katana Roots early for aggressive root development, then transition to Shogun Terra Bloom once flowering starts. This builds the plant structure to support larger yields downstream.
Technical specifications
- NPK ratio: 2.2-1.0-5.0
- Magnesium: 1.3%
- Sulphur: 0.8%
- Iron: 0.088%
- Boron: 0.008%
- Zinc: 0.006%
- Manganese: 0.004%
- Copper: 0.003%
- Molybdenum: 0.002%
- pH (concentrate): 3.4-3.8
- Key ingredient: SmartZen Yield Maximiser (proprietary plant extract and bio-stimulant blend)
- Storage: Cool, dry place above 7°C
Who this is for
- Soil growers tired of mixing three-part systems for each feed
- Growers after proven yield gains without switching to premium brands
- Anyone running hand-watered pots or automated drip systems in soil
- Newly planted seedlings and recently cut clones (SmartZen reduces transplant shock via amino acids and B vitamins)
- Growers wanting complete micronutrient coverage without buying separate boosters
Particularly suited to setups where consistent growth and measurable results matter more than cutting costs to the bone.
Our take
This is proper kit. The science is sound — SmartZen genuinely improves nutrient uptake and photosynthesis efficiency, which translates to visibly stronger plants and heavier yields. The single-part format saves time and eliminates mixing confusion, and the full micronutrient spectrum means you're not juggling separate supplements.
If you're running soil and want to step up without overcomplicating your feeding schedule, this is worth picking up. Does exactly what it should, day in, day out.
