Ultimate PK is a unique Phosphite based bloom stimulant formulated for the last weeks of flower development. Phosphite is an extremely bioavailable form of Phosphate that promotes healthy root systems and helps insure proper nutrient intake and plant health late in the bloom cycle. Ultimate PK is specially designed to act as a hardener, bulker, and ripener to push your production to the limit.ULTIMATE PK is responsible for:Larger and harder fruit and flowers with the best possible aroma and flavour .hb-qff .hb-qff-row { display: grid; grid-template-columns: 140px 1fr; gap: 14px; align-items: baseline; margin: 0 0 10px; } .hb-qff .hb-qff-row:last-child { margin-bottom: 0; } .hb-qff dt, .hb-qff dd { margin: 0; } @media (max-width: 480px) { .hb-qff .hb-qff-row { grid-template-columns: 1fr; gap: 3px; } } Quick Feed Facts THE HYDRO BROS Dilution / Dose 2ml per litre from week 5 of flowering, increasing to 2.5ml per litre from week 7 onward. When To Use Final weeks of flower — from week 5 through to harvest, as a hardener and ripener. Substrate Fit Soil, coco, and hydro. Grower Notes Runs alongside Basis A&B and C4 in late flower to bulk and harden fruit and flowers ahead of the ripening period.
