Mills Ultimate PK 5L


The ‘Big finish’ for your plants. Specifically designed for use in the last 2 to 4 weeks, Ultimate PK has been extensively tried and tested so it gives your plants that extra boost during ripening. Produces larger, heavier fruits with an increased aroma and flavour. A first rate nutrient essential for the final stages of bloom.

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Mills Ultimate PK is an essential flowering additive suitable for the last 2 to 4 weeks of the blooming stage. The top-quality ingredients used by Mills offer your plants’ the necessary support for a grand finale. What’s best, the product strengthens your plants’ internal structure and ensures high yield harvests. Mills has undergone years of research to guarantee that the Ultimate PK formula offers your plants the right nutrients for the ripening period. The booster’s success exceeds appearance, it also improves the aroma and flavor of fruits.


General Information

  • Mills Ultimate PK is suitable for all growing mediums including hydroponic systems, run-to waste hydroponics, and soil;
  • The booster comprises organic ingredients including Phosphate, Potassium, Zinc, Boron, Manganese, Molybdenum, Iron and Copper;
  • Growers use the booster during the last two to four weeks of the blooming phase.



  • Strong flowering stimulant;
  • Promotes the production of essential oil and enhances the quality of plants;
  • Strengthens the cell structure;
  • Growers use it as a deep cleaner for the root area;
  • Improves the aroma and taste of fruits;
  • Ensures high harvest yields.


The Science

Growers use Ultimate PK during the last stages of the flowering phase. It’s Phosphite-based formula, which is soluble, stimulates root development and optimizes the flow of oxygen to the roots. After years of research on the nutrients required to produce a top-quality harvest, Mills created Ultimate PK. The booster promotes essential oil production and enriches fruits’ taste and flavour. During the bloom phase, plants need increased levels of potassium and phosphorus. With Ultimate PK you can increase these levels and enjoy a high yield harvest. What’s best, the product strengthens your plants and helps them fight against pests and diseases.


How to Use

Use Ultimate PK throughout the last 2-4 weeks of the blooming phase at a dosage of 2ml/ L of water.


Best Practices

Ultimate PK is a user-friendly formula, which you can simply mix into your water tank. After adding all other additives, adjust the pH level accordingly. First, add the base nutrients and chase them with the additives.

Store the formula in a dark and cool place. Keep it protected from extreme temperatures and out of children’s reach. Don’t breath in or ingest the product as it can be harmful to your health. Avoid direct fire, heat or skin contact as lengthy exposure could lead to irritation.

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