What is the maximum recommended application rate of phosphorus fertilizers for lawns in Maryland?

The maximum recommended application rate of phosphorus fertilizers for lawns in Maryland is 0.9 pounds per 1,000 square feet. This guideline is rooted in environmental sustainability practices aimed at reducing nutrient runoff into waterways. High phosphorus levels can lead to water quality issues, such as algal blooms, which deplete oxygen and harm aquatic life. By adhering to this recommended rate, lawn care practices support the health of local ecosystems while still providing sufficient nutrients for grass growth.

A lower threshold, like 0.5 pounds, may not always meet the nutrient demands of the lawn, while higher rates, such as 1.0 or 2.0 pounds, can contribute to excessive phosphorus accumulation in soils, increasing the risk of runoff and subsequent environmental harm. Therefore, 0.9 pounds per 1,000 square feet strikes a balance between promoting healthy lawns and protecting the environment.