Cal. Food & Agric. Code § 52487

A violation of this chapter for having shipped, delivered, transported, or sold agricultural or vegetable seed that has false or misleading labeling shall be construed to have been committed at the time of discovery of the violation, and a complaint charging the violation shall be filed within one year from the time of discovery. No complaint that charges such a violation shall, however, be filed after two years from the date of sale.