Mills Ultimate PK

Professional Late-Bloom PK Booster

Mills Nutrients Ultimate PK is a high-performance phosphorus and potassium booster engineered to maximise flower weight, fruit density, and essential oil production during the final weeks of the bloom cycle. Delivering a targeted 0-7-6 PK ratio using ultra-clean, highly soluble mineral salts, Ultimate PK provides plants with the exact mineral boost needed to push yield potential to its absolute limit.

During late flowering, a plant's metabolic demand for phosphorus and potassium peaks. Ultimate PK supports this vital stage through an advanced, ultra-soluble formulation:

• Phosphorus (P): Drives rapid cell expansion and energy transfer (ATP), swelling flower clusters and packing on physical mass.

• Potassium (K): Regulates water pressure and sugar movement within plant tissue, drastically boosting terpene production, aroma, and final harvest quality.

• Deep Root Health & Clean Running: Formulated using premium-grade, low-residue mineral salts that prevent salt build-up and substrate clogging, keeping root zones active and healthy right up to the flush.

Ultimate PK is designed as the final stage in the Mills flowering system. It overlaps with Mills C4 in week 6 before taking over as the primary booster leading up to the final flush.

Pro-Tip: Always add Ultimate PK to your reservoir individually and stir thoroughly into solution. Because Ultimate PK is highly concentrated, do not combine it with other PK additives.

Key Benefits:

• Drives Maximum Floral Weight: Powerful 0-7-6 ratio swells buds and boosts overall yield density in late bloom.

• Enhances Terpenes & Essential Oils: High potassium levels drive sugar synthesis for noticeably sweeter flavours and richer aromas.

• Ultra-Clean & Soluble Formula: Dissolves completely without leaving heavy mineral residues or clogging drippers and pipework.

• Universal Substrate Use: Fully compatible with soil, coco coir, and active hydroponic systems.

• Supports Root Zone Health: Clean mineral delivery ensures the root system remains active during heavy late-stage feeding.

• Integrated Feeding System: Works seamlessly alongside Mills C4 before carrying crops through to the final harvest flush.