3 Del. C. § 2105: Labels.

(a) Any commercial fertilizer distributed in this State in containers shall have placed on or affixed to the container a label setting forth in clearly legible and conspicuous form the information required by § 2104(a)(1)-(4) of this title. In case of bulk shipments, this information in written or printed form shall accompany delivery and be supplied to the purchaser at the time of delivery.

(b) A commercial fertilizer formulated according to the open formula method according to specifications furnished by a consumer prior to mixing shall be labeled to show the net weight, guaranteed analysis of each ingredient, and the name and address of the distributor; and after mixing, the guaranteed analysis on the label is to be determined by percentage of weight of a ton the same as is defined under “grade” in § 2103 of this title.