EXHIBIT 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER AND ACTING PRINCIPAL FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with the accompanying quarterly report on Form 10-Q of Central Garden & Pet Company for the quarter ended March 26, 2016 (the “Report”), I, John R. Ranelli, President and Chief Executive Officer of Central Garden & Pet Company, hereby certify pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) such Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in such Report presents, in all material respects, the financial condition and results of operations of Central Garden & Pet Company.

May 5, 2016

/s/ JOHN R. RANELLI

John R. Ranelli

President and Chief Executive Officer

(Principal Executive Officer and Acting Principal Financial Officer)