Mills Ultimate PK

  • Mills Ultimate PK

PK boosters are essential when trying to maximise your yield. Phosphorus and Potassium PK are required in higher levels during the later stages of flower to develop larger denser fruits.

Ultimate PK by Mills Nutrients has been developed over time not only to increase yield but also increase root health and natural sugar production to enhance flavour and overall plant health.

Mills PK contains high levels of Phosphite which when combined with the trace minerals help to develop root growth and overall plant vigour.

Key Benefits:

  • Delivers larger heavier fruits
  • Stimulates root development
  • Increases natural sugar production
  • Improves plant vigour
  • Plant ripener

How and when to use:

Mills Ultimate PK should be used in the last few weeks of flowering and is suitable for any growing medium and any hydroponic system.

Weeks 5-6    2ml per litre

Weeks 7-8    2.5ml per litre

For a personal schedule please visit for the Mills Nutrient Calculator.

Available Options


Related Products

Mills Start-R

Mills Start-R

Mills Start-R is a Nitrogen rich rooting stimulant developed with high quality minerals to aid in ro..


Mills Vitalize

Mills Vitalize

Vilatize is a mono-silicic acid used in plant growth due to its exceptional and abundant benefits. P..


Mills Basis A+B

Mills Basis A+B

Mills Basis A+B will provide all the essential minerals needed to form the bulk of your plants requi..


Mills C4

Mills C4

C4 will provide the boost your plants need during the flowering stage for an enhanced yield and impr..


Media Orb