How frequently do I need to apply Honeywell Sulf-N PRO fertilizers?
Sulf-N PRO ammonium sulfate is a soluble source of nitrogen. Although it is not classified as slow-release, research demonstrates that the ammonium form of nitrogen in Sulf-N PRO fertilizers often provide a longer lasting green than other soluble N materials. After soils warm to 50 F, a 1 lb N/1000 sq ft application will last approx. 4-6 weeks, depending on weather conditions. Warm season grasses that typically use more nitrogen will require somewhat higher rates.
