Mills Ultimate PK Size:5L Rockwool Growing Substrate

Rockwool Growing Substrate

Customise your kit by choosing between Combi ducting and acoustic ducting via the dropdown menu

Highly concentrated

heats the oil and provides the heat

Can be used indoors and outdoors

Mills Ultimate PK Size:5L Rockwool Growing SubstrateMills Nutrients Ultimate PK Professional PK Booster For Maximum Yields Mills Nutrients Ultimate PK is a high performance phosphorus and potassium booster engineered to maximise fruit size, quality, and yield in the final weeks of the bloom cycle. Delivering a potent 0 7 6 PK ratio using ultra clean, highly soluble mineral salts, Ultimate PK gives flowering plants exactly what they demand at the most critical stage of their development. How Mills