In July 2022, Pennsylvania enacted a new fertilizer law that updated requirements for manufacturers and applicators of fertilizer.

Who is a fertilizer applicator? The term “applicator” refers to anyone who applies fertilizer, including lawn-care professionals, farmers and homeowners.

Calibrate: Follow the directions on the fertilizer label and use a fertilizer spreader that is properly calibrated.

Know the rate: Select a fertilizer that is appropriate for the lawn’s needs.

Phosphorous can’t be applied unless you are establishing or repairing turf, or a soil test indicates a phosphorous deficiency.

Nitrogen is limited to 0.7 pounds available nitrogen per 1,000 square feet or 0.9 pounds total nitrogen per 1,000 square feet.

Whenever possible, choose an enhanced efficiency fertilizer to ensure nutrients are available when the lawn needs them.

Environmental conditions: To reduce nutrient loss, applicators of fertilizer must follow these site restrictions:

Do not apply near water, storm drains or drainage ditches.

Maintain a 15-foot buffer from waterways.

Do not apply if heavy rain is expected.

Apply product using a properly calibrated fertilizer spreader.

Apply only to intended application site.

Fertilizer that lands on an impervious surface (roads, sidewalks, driveways) must be swept back onto turf.

It is important to follow all label directions and safety precautions to protect yourself and your lawn.

Preventing fertilizer loss keeps your lawn healthy, saves you money and protects our waterways.

It is important to properly assess your lawn’s nutrient needs prior to selecting and applying fertilizer.

Follow the 4Rs of nutrient management: Right Source, Right Rate, Right Time, Right Place.

Be wise when you fertilize.

“Growing Green” is contributed by Diane Dorn, Lehigh County Extension Office Staff, and Master Gardeners. Information: Lehigh County Extension Office, 610-391-9840; Northampton County Extension Office, 610-813-6613