NPK Industries Gold Series Technology presents “Multiply” & “Stack”. Multiply and Stack are designed to be used with all Nutrient Regiments and Feeding Programs. In Nature, all things have the potential to be perfect. In ideal conditions that potential is released. However a constant state of perfection can be difficult to attain. NPK Industries, Gold Series Technology is designed to replicate Natures own Constant State of Perfection. Using Multiply then Stack as directed unites Nature and Technology at your Fingertips. Want More? Multiply then Stack! Add Multiply every 7 to 10 days from week 1 to turnover. Foliar Spray Stack at turnover. Re-apply every 7 days for 6 weeks.