6509. TESTING FOR FERTILIZER AND NUTRIENTS

6509 TESTING FOR FERTILIZER AND NUTRIENTS 6509.1 Cultivation centers and manufacturers shall test all products for the presence and concentration of fertilizer and nutrients in accordance with this section before distributing, selling, or otherwise transferring the product to an internet retailer, manufacturer, or retailer. 6509.2 A leaf tissue sample or other test designed to elicit the presence and concentration of the following nutrients in the sampled medical cannabis or medical cannabis product: (a) Nitrogen (N); (b) Phosphorus (P); (c) Potassium (K); (d) Calcium (Ca); (e) Magnesium (Mg); (f) Sulfur (S); (g) Boron (B); (h) Copper (Cu); (i) Iron (Fe); (j) Manganese (Mn); (k) Zinc (Zn); (l) Molybdenum (Mo); (m) Sodium (Na); and (n) Chloride (Cl). 6509.3 The cultivation center and manufacturer shall be required to disclose to the testing laboratory all fertilizers and nutrients used during the growing or production of the medical cannabis or medical cannabis product being tested. 6509.4 The testing laboratory shall further test for the presence of all fertilizers and nutrients disclosed by the cultivation center and manufacturer in accordance with the testing labs standard operating procedures. SOURCE: Final Rulemaking published at 73 DCR 002136 (February 20, 2026). District of Columbia Municipal Regulations Medical Cannabis 22-C DCMR § 6509