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BAC F1 Extreme Booster 1 l
BAC F1 Extreme Booster 1 litre is a highly concentrated PK booster with NPK 0-13-14, enriched with sugar molasses and premium trace elements. This powerful bloom supplement delivers high doses of phosphorus and potassium precisely when plants demand them most: from the sixth week of flowering. Universally compatible with all substrates – soil, coco, and hydro – and all nutrient lines including those from other brands. Dosing at 20–30 ml per 10 litres of water, adjusting total EC to approximately 2.2. Store above 8°C. Contains over 50 different trace elements. Power your late bloom with proven Dutch PK technology.
BAC F1 Extreme Booster 1 litre – concentrated PK booster for explosive late-bloom performance
The final weeks of flowering are where harvests are won or lost. This is when phosphorus and potassium demand peaks, and supplementing beyond your base nutrition becomes critical for maximising flower weight, density, and quality. BAC F1 Extreme Booster delivers that supplementation in a highly concentrated NPK 0-13-14 formula enriched with sugar molasses and premium trace elements. As a universal additive from BAC, it integrates seamlessly with any base nutrient line on any substrate.
PK 0-13-14 with sugar molasses: what's inside
The efficacy of the F1 Extreme Booster derives from three synergistic components. Phosphorus at 12.6% P2O5 serves as the energy driver — it catalyses cellular energy transfer, powering flower formation and fruit development. Potassium at 13.8% K2O functions as the physiological regulator, supporting turgor pressure, enzyme activation, and sugar and starch synthesis that directly influence flower density and hardness.
- Phosphorus (P): drives cellular energy transfer, flower initiation, and bud development during peak bloom.
- Potassium (K): regulates water balance, strengthens cell walls, and enhances stress resistance in the critical late-bloom phase.
- Sugar molasses: feeds beneficial micro-organisms and provides directly available carbohydrates when the plant's own sugar production cannot keep pace with flowering demand.
- 50+ trace elements: comprehensive micronutrient profile ensuring no deficiency limits flower production during the final critical weeks.
Timing and dosing protocol from week 6
Introduce the F1 Extreme Booster from the sixth week of flowering. Apply 20 to 30 ml per 10 litres of water on top of your regular bloom base nutrition, adjusting total EC to approximately 2.2. The booster can be added with every feed. Always add the booster after your base nutrients and verify total EC with a calibrated meter. Discontinue use during the final flush week. Store the bottle upright in a dark location above 8°C and shake thoroughly before every use to ensure homogeneous distribution of all active ingredients.
Universal compatibility across all substrates and nutrient lines
The defining feature of the F1 Extreme Booster is its universal compatibility. Whether you are running BAC Soil Bloom, BAC Hydro Bloom A/B, or a third-party nutrient system, this PK booster integrates without conflict. For a comprehensive late-bloom programme, many growers combine the F1 Extreme Booster with the BAC Bloom Stimulator, which activates beneficial micro-organisms and accelerates flower set. The F1 Extreme Booster is fully water-soluble and certified safe for all automated irrigation systems, including drip lines, flood-and-drain setups, and aeroponic sprayers.
Order the BAC F1 Extreme Booster 1 litre from our Belgian growshop for fast delivery across Belgium. The PK booster that defines the difference in your final bloom weeks.
When should I start using BAC F1 Extreme Booster?
Begin from the sixth week of flowering and continue until the final flush week. Dose 20 to 30 ml per 10 litres of water in addition to your base bloom nutrition. The total EC of your solution should reach approximately 2.2 after adding the booster. Consult the BAC feeding schedule for exact timing within your specific grow cycle.
Is the F1 Extreme Booster compatible with non-BAC nutrient lines?
The F1 Extreme Booster is universally compatible with all nutrient brands and all substrate types. It functions as a standalone PK supplement that adds to your existing bloom nutrition regardless of the manufacturer. Always add the booster after your base nutrients and check the total EC after mixing.
What is the difference between the F1 Extreme Booster and BAC Bloom Stimulator?
These are complementary products with distinct mechanisms. The F1 Extreme Booster is a mineral PK supplement delivering phosphorus and potassium for flower filling and hardening. The Bloom Stimulator is a biological product that activates beneficial micro-organisms and promotes flower initiation. Many growers use both together for maximum bloom performance.
Will the F1 Extreme Booster clog my drip irrigation system?
No. The F1 Extreme Booster is fully water-soluble and will not clog drip systems, flood-and-drain setups, or aeroponic sprayers. Shake the bottle well before each use and store above 8°C to prevent crystallisation of the concentrated mineral salts.
