Zinc 9 is intended for the prevention and/or correction of zinc deficiencies.
Zinc 9 can be soil or foliar applied.
Zinc 9 can be applied alone or in combination with compatible agricultural chemicals or liquid fertilizers, including those containing 100% orthophosphate and suspensions.
Zinc 9 can be applied to most field, vegetable, greenhouse and tree crops that are responsive to zinc.
Source: Pure Grade, http://www.puregrade.com/labels/MSLBL-Zinc9.pdf