Plagron Nutrients Cocos A&B — Two-Part Coco Nutrient Formula at Smart Pricing
Best for: Growers running coco substrates who want reliable, forgiving nutrients without paying premium brand prices
Our thoughts
This is the kind of nutrient you pick up and just get on with. Plagron Cocos A&B is engineered specifically for coconut coir, which means it actually understands how coco works — calcium binding, pH buffering, the lot. Growers consistently report clean results, stable reservoirs, and zero faffing around. One we shift a lot of because it delivers.
Plagron Nutrients Cocos A&B is a two-part mineral nutrient system designed from the ground up for coconut coir growing. Unlike generic hydroponic formulas that ignore coco's unique chemistry, this separates calcium and phosphorus into two bottles to prevent lockout and ensure consistent, forgivable feeding across both grow and bloom phases. Dutch formulation, proven European heritage, sensible pricing.
How it compares
Two-part coco nutrients sit in a specific performance bracket.
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vs. single-bottle nutrients: Two-part separation means calcium and phosphorus don't precipitate out. You get more control, fewer lockout headaches, cleaner reservoir chemistry
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vs. Canna Coco A&B: Same functional approach, significantly lower cost. Plagron delivers equivalent results without the premium markup
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vs. Advanced Nutrients pH Perfect: Advanced Nutrients automates pH adjustment, but you pay for that. Plagron's wide pH absorption window does the same job manually — simpler, cheaper, just as effective
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vs. three-part systems: You don't need the extra complexity. Plagron's balanced NPK ratio for coco means you get excellent results without third bottles and guesswork
In straight terms: professional-grade formulation at a price that makes sense for growers who actually use it regularly.
Usage guidance
Plagron Cocos A&B works across different setups. The principle is simple — always use equal parts A and B.
Dosage
Maximum 4ml of Cocos A per litre of water (1:250 ratio). Use exactly the same amount of Cocos B. Mix them separately into your water first, then combine. This separation prevents the calcium and phosphorus from precipitating.
pH management
Target pH between 5.5 and 6.5 after mixing. Plagron's formula absorbs nutrients over a wide pH range, so you don't need perfect accuracy — there's built-in forgiveness. Check pH daily if storing solution; it can drift slowly upwards.
Reservoir storage
Mixed solution lasts 4–10 days depending on your tank hygiene and room conditions. Don't mix organic additives into the solution — they spoil within 48 hours. Monitor pH daily as a habit.
Through grow and bloom
Same feeding strength both phases. Plagron Cocos A&B works as your base nutrient the whole way. Layer in bloom boosters or additives from the Plagron range if you're after maximum results, but the base formula handles the full cycle on its own.
Technical specifications
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Product type: Two-part mineral base nutrient (concentrate)
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Cocos A NPK: 4-0-1 with 4.5% Calcium
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Cocos B NPK: 1-4-2 with 2% MgO (Magnesium Oxide)
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Dosage: 4ml per litre maximum (1:250 ratio)
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Target pH: 5.5–6.5 (post-mix)
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Solution storage life: 4–10 days (depending on tank hygiene)
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Available sizes: 1 litre, 5 litre, 10 litre, 20 litre
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Key advantage: Nutrient absorption across wide pH range — built-in pH buffering so you're not chasing perfect numbers
Who this is for
- Coco growers who've outgrown single-bottle nutrients and want more control
- First-time coco users wanting a forgiving, proven formula with no hidden complexity
- Growers running multiple beds or rooms where nutrient costs add up — this is where you save
- Anyone fed up with calcium deficiencies or nutrient lockout — coco-specific formulation fixes that
- Serious growers who want Dutch-engineered performance at mid-tier pricing
Particularly suited to setups where reliability and simplicity matter more than automated bells and whistles.
Our take
Plagron Cocos A&B is proper nutrient kit. It understands coco chemistry, it's forgiving if your pH drifts slightly, and growers report clean, stable results with zero drama. The two-part separation genuinely prevents lockout — that's not marketing, that's chemistry.
At this price point, you're getting professional formulation without the premium brand tax. If you're running coco and want to stop guessing what works together, worth picking up. Does exactly what it should, reservoir after reservoir.
