Présentation du produit
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Mills Ultimate PK: the flowering PK fertilizer to densify and ripen your harvests
When flowering enters its decisive phase, every input counts. The Mills Ultimate PK flowering PK fertilizer is specially designed to intervene at this key moment of the plant cycle, providing the essential mineral elements that the plant demands to optimally swell, harden, and ripen its flowers.
Developed by Mills Nutrients, a brand recognized in the world of indoor and hydroponic cultivation, Ultimate PK combines phosphorus, potassium, microelements, and silicon in an organo-mineral formula designed to integrate naturally into the Mills nutrition program. Whether you cultivate in hydroponics, substrate, or soil, this flowering booster meets the specific needs of the plant at the end of its cycle.
The GrowLED team offers this product in 5 different formats, from 250 ml to 10 L, so you can adapt your order to the size of your crop and your frequency of use.
Technical Specifications
| Feature | Detail |
|---|---|
| Brand | Mills Nutrients |
| Product Name | Ultimate PK |
| Type | Flowering fertilizer (PK booster) |
| Application Phase | Flowering |
| Composition | Phosphorus, Potassium, Microelements, Silicon |
| Recommended Dosage | 2 to 2.5 ml/L |
| Compatibility | Basis A+B, C4 by Mills |
| Available Formats | 250 ml, 500 ml, 1 L, 5 L, 10 L |
| References | NS-MILS0019 / NS-MILS0020 / NS-MILS0021 / NS-MILS0022 / NS-MILS0023 |
| Category | Fertilizers by Brands |
Usage Guide
Ultimate PK is used exclusively during the flowering phase, when the plant enters its phase of flower swelling and maturation. It is at this stage that the needs for phosphorus and potassium increase significantly, and the addition of silicon helps strengthen cell walls for denser and more resistant flowers.
The dosage recommended by Mills is 2 to 2.5 ml per liter of nutrient solution. For beginner growers or more sensitive plants, start with the low dose of 2 ml/L and observe your plants' reaction before adjusting. Always dilute Ultimate PK in water before adding other elements to your solution, and mix well to ensure homogeneous distribution.
It is advisable to gradually integrate Ultimate PK into your flowering program, introducing it from the beginning of the flower swelling phase and maintaining it until about one week before the final flush. This application window allows you to fully benefit from the product's densifying and ripening effect without risking overloading the plant at the end of the cycle.
Store the product away from light and extreme temperatures, in a cool, dry place. Shake well before each use to ensure the homogeneity of the formula.
Compatibility and Associations
Ultimate PK is designed to integrate perfectly into the Mills nutrition ecosystem. It is officially compatible with Basis A+B, the base nutrient of the range, as well as with C4, Mills' flagship flowering stimulator. These three products form a coherent trio that covers all the plant's nutritional needs during the flowering phase: balanced mineral base, floral stimulation, and targeted PK supply.
To go even further in optimizing your cultivation, the GrowLED team recommends associating Ultimate PK with other complementary products from the Mills range. Mills Vitalize is an excellent complement: rich in silicon, it strengthens the plant's cellular structure and improves its resistance to stress, which amplifies the effects of Ultimate PK on flower density. Mills Star can also be integrated into your program to stimulate resin and aroma production at the end of flowering. Finally, if you notice calcium or magnesium deficiencies, Mills Calmag is the ideal adjuster to maintain optimal nutritional balance throughout the cycle.
Ultimate PK can be used in hydroponics, substrate cultivation (coco, soil, rockwool), and aeroponics. Whatever your cultivation method, always check and adjust the pH of your solution after adding all your nutrients.
Frequently Asked Questions
When should I use Mills Ultimate PK in my flowering cycle?
Ultimate PK is used during the flowering phase, more precisely from the moment the flowers begin to swell and densify. This is generally from the 3rd or 4th week of flowering depending on the varieties. It is applied until about one week before the final flush, to allow the plant time to assimilate the last inputs and begin its final maturation phase. The recommended dosage is 2 to 2.5 ml/L with each watering during this period.
Where does the Mills Nutrients brand come from?
Mills Nutrients is a Dutch brand, founded in the Netherlands, a country historically recognized for its expertise in horticulture and greenhouse cultivation. The brand has developed by offering organo-mineral formulas designed to meet the requirements of demanding professional and amateur growers. Its products are now distributed in many countries, including France via specialized retailers like GrowLED.
Can Ultimate PK be used with other brands of fertilizers?
Ultimate PK is officially formulated to work with the Mills range (Basis A+B, C4). If you use a base nutrient from another brand, it is possible to integrate it, but the GrowLED team advises you to perform a compatibility test by mixing the products in a small volume of water before applying the solution to your entire crop. Some formulas may interact differently depending on their composition. When in doubt, stick to the Mills ecosystem to ensure consistent results.
Which format should I choose based on the size of my crop?
For a personal crop of a few plants, the 250 ml or 500 ml format is largely sufficient to cover several weeks of flowering at the recommended dosage of 2 to 2.5 ml/L. For a medium-sized crop or regular use over several cycles, the 1 L or 5 L format offers a better volume/use ratio. The 10 L format is intended for growers producing large quantities or semi-professional structures wishing to optimize their purchases.
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