15.20.10.09

.09 General Requirements for the Application of Fertilizer.

A. A professional fertilizer applicator or trained employee may not:

(1) Apply fertilizer intended for use on turf to an impervious surface; or

(2) Apply fertilizer containing nitrogen or phosphorus to turf:

(a) At any time when the ground is frozen;

(b) Within 15 feet of waters of the State, however, if using a drop spreader, rotary spreader with a deflector or a targeted spray, then the distance may be reduced to 10 feet; or

(c) In an amount that is inconsistent with the annual recommended rate established by the University of Maryland (Maryland Nutrient Management Manual I-E1, COMAR 15.20.07.02).

B. A professional fertilizer applicator or trained employee may not apply enhanced efficiency fertilizer to turf:

(1) At a rate exceeding 2.5 pounds per 1,000 square feet of nitrogen per year;

(2) Before March 1 or after November 15 of any calendar year;

(3) In excess of 80 percent of the total annual recommended rate of nitrogen established by the University of Maryland Extension (Maryland Nutrient Management Manual I-E1, COMAR 15.20.07.02); and

(4) Having a release rate in excess of 0.7 pounds per 1000 square feet of nitrogen per month.

C. Except as specified for enhanced efficiency fertilizer, neither a professional fertilizer applicator, nor a trained employee may apply fertilizer to turf:

(1) At an application rate of more than 0.7 pounds per 1000 square feet of water-soluble nitrogen; and

(2) At an application rate of more than 0.9 pounds per 1,000 square feet of total nitrogen.

D. Except as provided for in §C(2) of this regulation:

(1) A professional fertilizer applicator or trained employee shall apply nitrogen or phosphorus to turf only from March 1 through November 15 of any calendar year; and

(2) From November 16 through December 1, a professional fertilizer applicator or a trained employee may apply up to 0.5 pounds per 1,000 square feet of water-soluble nitrogen.