Mills Ultimate PK

Mills Nutrients Ultimate PK | Professional PK Booster For Maximum Yields

Mills Nutrients Ultimate PK is a high-performance phosphorus and potassium booster engineered to maximise fruit size, quality, and yield in the final weeks of the bloom cycle. Delivering a potent 0-7-6 PK ratio using ultra-clean, highly soluble mineral salts, Ultimate PK gives flowering plants exactly what they demand at the most critical stage of their development.

How Mills Ultimate PK Works

As plants enter peak flower, their requirement for phosphorus and potassium rises sharply. Ultimate PK meets this increased demand with precision, using clean, super-soluble mineral salts that are rapidly absorbed and leave minimal residue — making it an excellent choice for soil, coco coir, and hydroponic systems alike, with virtually no risk of blockages or salt buildup.

The high bioavailability of these minerals ensures maximum uptake efficiency at exactly the right time, driving exceptional fruit development, enhanced essential oil production, and the kind of flavour and aroma profiles that set premium harvests apart.

Key Benefits Of Mills Nutrients Ultimate PK

• Delivers a powerful 0-7-6 PK ratio to meet peak flowering demand
• Maximises fruit size, density, and overall yield potential
• Enhances essential oil production for superior flavours and aromas
• Formulated with clean, ultra-soluble mineral salts for superior bioavailability
• Leaves minimal residue — safe for use in soil, coco, and hydroponic systems
• Maintains root health while pushing bloom performance to its limits
• Extremely concentrated and potent — not to be combined with other PK boosters
• Available in two sizes: 1L, and 5L

Recommended Feeding Schedule

• C4: Weeks 3–6 of flowering
• Ultimate PK: Week 6 through to final flush

From week 6, C4 and Ultimate PK are used together for a powerful overlapping boost before transitioning to Ultimate PK alone through to harvest. Always refer to the Mills Nutrients feed chart in the downloads section for the complete schedule.

How To Use Mills Ultimate PK

Apply Ultimate PK at a rate of 2ml per litre during the last 2–4 weeks of the flowering stage. Always add one nutrient or additive at a time, stirring thoroughly between each addition.

Store at room temperature and keep away from freezing conditions, as exposure to frost will compromise the product’s effectiveness.