Mills Ultimate PK 100ml — Heavy Yield PK Booster

Mills Ultimate PK 100ml — Heavyweight Late-Flower PK Booster

A heavyweight PK booster from Mills packed with high levels of phosphorus and potassium — the two macronutrients plants demand in larger quantities during peak flowering. Used in the last 2-4 weeks of bloom to enhance fruit quality, drive final yield, and maintain plant health through the finishing phase. The 100ml concentrate is small but the dilution rate is low, so it goes further than it looks.

Why growers choose Mills Ultimate PK:

• Heavyweight PK formulation — high concentrations of phosphorus and potassium for peak demand
• Used last 2-4 weeks of flowering — matches the window when plants want maximum PK
• Enhances final quality — not just bulk, improves the compounds that matter at harvest
• Drives yield increases — measurable harvest-weight gains when applied at correct timing
• Maintains plant health through finish — supports plants through late-flower stress period
• Premium Mills formulation — respected Dutch nutrient brand, proven track record
• 100ml concentrate goes a long way — low dilution rate means good value per grow

Who it's not for:

An additive, not a base nutrient — use alongside a full feeding programme. For early-flower PK boosting, Bud Ignitor or Flower Burst are more appropriate; Ultimate PK is late-flower focused. Stop 7-10 days before harvest to allow a proper flush. High-PK additives can lock out calcium if over-applied — stick to label dilution carefully.

Available to collect from our Stone shop at Unit 24, Emerald Way, ST15 0SR — or ships the same working day from our UK warehouse. Not sure if this is the right fit? Give us a ring on 01785 556355 or email sales@roots2riches.com — we're growers ourselves, happy to help.