Gold Label Hydro A&B is a professional grade two part nutrient for the vegetative and flowering phase in peat, hydro substrates such as expanded clay pebbles (Gold Label RHP Hydrocorn) and rockwool mediums. Used Hydro A&B together will make any hydroponic garden the talk of the town! Use in combination with Gold Label Roots, Ultra Mg, and Ultra PK for optimum results.
