Grow is a component of the CES base 3-part. To be used in the vegetative stage, Grow adds more nitrogen for growth and potassium to enhance the plant's photosynthetic rate and energy transfer throughout the plant. Grow is used only in the vegetative stage and is completely omitted during the blooming stage. Some sizes may not be stocked in all locations. Item will not ship UPS. Must ship on a pallet flat rate only.