Stimulating and hardening flavoursome, richly aromatic, supermassive blooms and fruits, Mills Ultimate PK brings your harvest home in spectacular style. This potassium and phosphorous-rich booster provides the perfect burst of minerals required during the final stages of flowering. 

Firstly Ultimate PK lays a bridgehead. It quickly expands and oxygenates the root zone, making your plant incredibly receptive to incoming nutrients. With uptake assured the booster sets about energising the bloom and firming up cell structures to improve fruit and flower density. This firming-up takes place in the stems too where, as a result, yield-bearing capacity is increased. Other elements flowing freely into your plant enhance the production of sugars and essential oils for superior aroma and flavour.

Ideally used in the last two to four weeks of flowering, Ultimate PK absorbs cleanly without leaving nuisance residues. Designed for maximum usability, it is suitable for all cultivation systems and any growing medium. 

• Expands and oxygenates the root zone ready for uptake
• Energises the bloom and firms up cell structures
• Improves fruit and flower density
• Increases yield-bearing capacity
• Enhances production of sugars and essential oils 
• Absorbs cleanly without leaving nuisance residues
• Suitable for all cultivation systems and any growing medium 

Order and pay online before 1pm for free, same-day, in-store collection (Mon to Sat).

Order and pay online after 1pm, or on a Sunday, or on a Bank Holiday for free, next-day, in-store collection.

* Please await your ‘Order Ready’ email before setting out to collect your order. *

On orders over £99 we offer free standard U.K. delivery* within 1-3 days of your order being placed.

Your goods will be transported securely, discreetly, and with tracking to ensure you have the best possible idea of when they’ll be delivered.

*exclusions and surcharges may apply, please see full Delivery Information for details.