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BAC Organic PK Booster 1 l
BAC Organic PK Booster 1 litre is the full-size format of BAC's certified organic phosphorus and potassium booster, designed for growers with larger cultivation areas or multiple bloom cycles per season. Same NPK 4-2-8 formula as the 500 ml, delivering biological phosphorus and potassium supplemented with calcium, iron, and five additional trace elements. Progressive dosing from 10–40 ml per 10 litres accompanies escalating nutritional demand through bloom. No pH or EC measurement required. Vegan certified and Ecocert compatible. The cost-effective organic PK booster for committed biological growers scaling their operation.
BAC Organic PK Booster 1 litre – scaling organic PK supplementation for serious growers
For growers who have already integrated the BAC Organic PK Booster into their bloom programme, the 1 litre format delivers the same NPK 4-2-8 biological formula in a more cost-effective and practically sized package. With progressive dosing from 10 to 40 ml per 10 litres, consumption accelerates significantly in late bloom — the 1 litre format ensures uninterrupted supply through to harvest. This organic PK booster from BAC pairs directly with BAC Bloom Organic 1 litre as the PK supplement in the complete biological programme.
Why 1 litre is the smart format for serious organic growers
The progressive dosing protocol of the Organic PK Booster means consumption increases dramatically as bloom advances. Starting at 10 ml per 10 litres in early bloom and ramping to 40 ml at peak, the 500 ml format can be depleted precisely when PK demand is highest. The 1 litre format eliminates this supply risk while delivering better value per millilitre.
- NPK 4-2-8: potassium-dominant organic profile that maximises in-plant sugar production and flower filling.
- Progressive dosing: from 10 to 40 ml per 10 litres — the 1 litre format covers this entire ramp without interruption.
- Trace elements: calcium, copper, iron, manganese, sulphur, and zinc for comprehensive micronutrient support alongside the PK boost.
- Better value: lower cost per millilitre compared to the 500 ml format.
Building dosage through the bloom cycle
Introduce the Organic PK Booster from the second week of flowering at 10 ml per 10 litres. Increase weekly in measured steps: as plants mature and flowers develop, phosphorus and potassium demand intensifies progressively. By late bloom, reach 40 ml per 10 litres. Apply with every watering alongside your base bloom nutrition. Discontinue during the final flush week. In organic cultivation, EC measurement is unnecessary — soil biology self-regulates nutrient availability based on plant demand and microbial conversion rates.
Integrating the Organic PK Booster with BAC stimulators
The Organic PK Booster delivers maximum impact when paired with the BAC Bloom Stimulator 120 ml. While the PK Booster provides the raw nutritional elements — phosphorus and potassium — the Bloom Stimulator accelerates their biological conversion by activating and multiplying beneficial soil micro-organisms. Together they form a synergistic bloom stack that drives flower initiation, improves nutrient cycling efficiency, and enhances the quality and complexity of the final product. In the last week of cultivation, complete the programme with BAC Final Solution 120 ml for a thorough substrate flush that removes accumulated residues and ensures end-product purity.
Order BAC Organic PK Booster 1 litre from our Belgian growshop for fast delivery across Belgium. The cost-effective organic PK format for Belgian growers running full biological bloom programmes.
What is the difference between the 500 ml and 1 litre Organic PK Booster?
The formulation is identical: same NPK 4-2-8, same biological ingredients, same dosing at 10 to 40 ml per 10 litres. Only the packaging size differs. The 1 litre format provides better value per millilitre and sufficient supply for complete bloom cycles on larger cultivation areas.
Why is progressive dosing important?
Progressive dosing mirrors the natural escalation of phosphorus and potassium demand during flowering. Early bloom requires moderate PK supplementation, but demand increases substantially as flowers develop and fill. The 10 to 40 ml progression ensures plants receive appropriately scaled nutrition at every stage without overfeeding or underfeeding.
Is the Organic PK Booster compatible with Ecocert certification?
The Organic PK Booster is compatible with Ecocert certification requirements. All ingredients are of biological origin and the product carries Vegan certification. For commercial producers cultivating under organic labelling schemes, this is the only PK booster in the BAC range that maintains full compliance.
How long does a 1 litre bottle last?
Duration depends on your cultivation area and bloom length. Progressive dosing means increasing consumption over time. For an average grow with several plants, 1 litre provides ample supply for a complete flowering period. Larger operations may require multiple bottles per cycle.
