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Biotabs Bio PK 5-8 0.5l
Biotabs Bio PK 5-8 in the 0.5 litre bottle is a certified 100% organic bloom booster with an NPK ratio of 2-5-8, enriched with seaweed extract, vitamins A, B1, B2, B3, B12, auxins and phytohormones. This liquid fertiliser delivers the additional phosphorus and potassium required during the flowering phase for larger, denser and more aromatic flowers. Dose at 1 to 3 ml per litre of water at every irrigation from the second week of flowering until one week before harvest. The formulation also includes 2.5 percent calcium, molasses and humic acid. Half a litre yields 166 to 500 litres of bloom solution, making it an accessible entry format for evaluating organic PK supplementation.
Biotabs Bio PK 5-8 half litre — organic bloom booster delivering phosphorus, potassium and bioactive compounds
Flowering is the most nutritionally demanding phase of any cultivation cycle, with phosphorus and potassium requirements increasing dramatically as plants redirect metabolic energy toward reproductive tissue formation. Biotabs Bio PK 5-8 addresses this demand with a certified organic formulation that goes beyond simple PK supplementation — delivering seaweed-derived phytohormones, a full vitamin complex and humic acid alongside the primary macronutrients. The 0.5L format provides an entry point for growers evaluating organic bloom boosting within the Biotabs system.
Formulation breakdown: NPK 2-5-8 plus bioactive complex
Bio PK 5-8 combines targeted macronutrient supplementation with a suite of bioactive compounds that amplify flowering performance through multiple pathways:
- Seaweed extract — delivers natural auxins and phytohormones that regulate cell division and direct tissue differentiation toward floral development
- Vitamins A, B1, B2, B3, B12 — serve as enzymatic cofactors in energy metabolism pathways that peak during the high-demand flowering phase
- Calcium (2.5%) — prevents cell wall degradation and ensures structural integrity of flower stems and inflorescences
- Molasses and humic acid — sustain soil microbiome activity and enhance cation exchange capacity during the metabolically intensive flowering period
Two application methods
Bio PK 5-8 supports two complementary dosing strategies. The continuous method adds 1-3 ml per litre at every irrigation from week two of flowering until one week before harvest. The pulse method delivers 10 ml per plant (diluted in minimum 1 litre of water) during flowering weeks 3, 4, 5 and 6. Do not use Bio PK 5-8 in drip irrigation systems — the organic components can block lines and emitters.
The 0.5L bottle produces 166-500 litres of bloom solution depending on dilution rate. Pair with Orcatrex for base nutrition and Mycotrex for enhanced root uptake. For higher volume requirements, the 1 litre format offers a lower per-litre cost.
Biotabs Bio PK 5-8 is certified 100% organic. Order from Plant&Flower for fast delivery across Belgium.
What is the dosing rate for Biotabs Bio PK 5-8?
Add 1 to 3 ml of Bio PK 5-8 per litre of water at every irrigation during flowering. Alternatively, apply 10 ml per plant (diluted in at least 1 litre of water) during flowering weeks 3 through 6.
When should I start using Bio PK 5-8?
Begin application from the second week of flowering and continue until one week before harvest. This window aligns with the period of peak phosphorus and potassium demand.
Can Bio PK 5-8 be used in drip irrigation systems?
Bio PK 5-8 is not recommended for drip irrigation systems. The organic components can clog tubing and drip emitters. Apply via manual watering directly to the root zone.
How many litres of bloom solution does 0.5 litres of Bio PK 5-8 produce?
At 1 ml per litre, half a litre yields 500 litres of bloom solution. At the higher rate of 3 ml per litre, the yield is approximately 166 litres.
