Idaho Code § 22-607
(1) Any fertilizer distributed in this state in containers shall have placed on or affixed to the container a label setting forth in a clearly legible and conspicuous form the following information:
(3) Each delivery of a customer-formula fertilizer shall contain those ingredients specified by the purchaser. The ingredients shall be shown on the statement or invoice with the amount contained therein, and a record of all invoices of customer-formula grade mixes shall be kept by the registrant for a period of thirty-six (36) months and shall be available to the department upon request; provided, that each delivery shall be accompanied by either a statement, invoice, delivery slip, or label if bagged, containing the following information:
[22-607, added 2000, ch. 295, sec. 2, p. 1017; am. 2008, ch. 131, sec. 3, p. 371.]