MILLS ULTIMATE PK

Description

Mills Ultimate PK is a high-performance phosphorus and potassium booster that we have been recommending to UK growers since 2017 as one of the most effective late-flowering supplements available. Developed by Mills Nutrients — a Dutch nutrient brand with decades of elite horticultural experience — Ultimate PK delivers a precisely calibrated P:K ratio that supports maximum flower mass, enhanced terpene production and exceptional finish quality. It is designed for use during the mid-to-late flowering phase when the plant’s demand for these key macronutrients peaks.

How Mills Ultimate PK Drives Flower Development

Phosphorus is the central element in ATP synthesis — the molecule that powers every energy-requiring process in the plant, including photosynthesis, nutrient uptake and flower development. Potassium supports the transport of sugars and carbohydrates from leaves to developing flowers, contributing directly to density, weight and aromatic compound production. During the peak flowering phase, plants deplete available phosphorus and potassium rapidly, and base nutrients alone often cannot meet the increased demand. Mills Ultimate PK bridges this gap with a concentrated, highly bioavailable source of both elements formulated to be absorbed quickly without destabilising the overall nutrient balance. Growers consistently report harder, heavier flowers with improved aroma when Ultimate PK is incorporated into the late-bloom schedule.

Dosage, Timing and Feed Programme Compatibility

Use Mills Ultimate PK at 0.5–1 ml per litre from weeks 4–7 of flowering, adjusting the rate based on plant response and EC readings. Always introduce gradually and monitor for signs of nutrient excess. Ultimate PK is fully compatible with the Mills base nutrient range (Mills Basis A&B, Mills Start-R and Mills C4) and with most third-party base nutrients. For best results, combine with Mills C4 bloom stimulator and monitor EC closely throughout the late-bloom phase. Begin the final flush in the last 7–10 days of flowering using plain, pH-adjusted water.