MIlls Ultimate PK


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The ‘Big finish’ for your plants. Specifically designed for use in the last 2 to 4 weeks, Ultimate PK has been extensively tried and tested so it gives your plants that extra boost during ripening. Produces larger, heavier fruits with an increased aroma and flavour. A first rate nutrient essential for the final stages of bloom.

Larger and harder fruits and flowers 

Hard cell structure

Best possible aroma and flavour


Phosphate (P2O5): 7.4 %

Potassium (K2O): 6.6 %

Boron (B): 0.0100 %

Copper (Cu): 0.0210 %

Iron (Fe): 0.0480 %

Manganese (Mn): 0.0160 %

Molybdenum (Mo): 0.0010 %

Zinc (Zn): 0.0080 %

Ultimate PK is a deep clean for your plants root zone. Hardener, Bulker, Ripener, very clean and super soluble mineral salts.  Keep this product at room temperature. Do not allow it to freeze.

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Shipping & Delivery

Shipping & Delivery

All our products are delivered in unmarked packaging.

Express parcel delivery service

All our products are shipped via DPD with email notifications 1 hour before delivery.  Prices are

  • Under 2KG - £3.99
  • Over 2KG - £7.99 
  • Free shipping on all orders over £250

Some postcodes within the UK, including but not limited to the Scottish Highlands and Northern Ireland will incur a delivery surcharge, for details please contact us PRIOR to placing an order.