TurfgrassPro 28 - 0 - 0 is only labeled for use in turfgrass, so we would not recommend using it around anything edible such as corn. Please check with your local Dept of Agriculture for a product recommendation that would be safe for these areas.
TurfgrassPro 28 - 0 - 0 rates vary depending on the type of turfgrass per the product label. Use higher rates in high sodium soils and / or prior to expected heat stress. Please remember the amount of water used is not critical, but should be sufficient for uniform coverage of the target area. Calibrate by determining the volume of water required to treat 1,000 square feet.
Cool Season Turf: 4-9 oz. per 1000 ft. sq.
Warm Season Turf: 6-12 oz. per 1000 ft. sq.