ACQUISITIONS AND INVESTMENTS	9 Months Ended
ACQUISITIONS AND INVESTMENTS	Jul. 03, 2021
Equity Method Investments and Joint Ventures [Abstract]
ACQUISITIONS AND INVESTMENTS	ACQUISITIONS AND INVESTMENTS On December 31, 2020, pursuant to the terms of the Contribution and Unit Purchase Agreement between the Company and Alabama Farmers Cooperative, Inc. (“AFC”), the Company acquired a 50% equity interest in the Bonnie Plants business of planting, growing, developing, manufacturing, distributing, marketing, and selling live plants, plant food, fertilizer and potting soil through a newly formed joint venture with AFC (“Bonnie Plants, LLC”) in exchange for a cash payment of $100.7, as well as non-cash investing activities that included forgiveness of the Company’s outstanding loan receivable with AFC and surrender of the Company’s options to increase its economic interest in the Bonnie Plants business. The Company’s loan receivable with AFC, which was previously recognized in the “Other assets” line in the Condensed Consolidated Balance Sheets, had a carrying value of $66.4 on December 31, 2020 and the Company recognized a gain of $12.5 during the three months ended January 2, 2021 to write-up the value of the loan to its closing date fair value of $78.9 in the “Other non-operating income, net” line in the Condensed Consolidated Statements of Operations. The Company’s options to increase its economic interest in the Bonnie Plants business were previously recognized in the “Other assets” line in the Condensed Consolidated Balance Sheets and had an estimated fair value of $23.3 on December 31, 2020. The Company’s interest in Bonnie Plants, LLC had an initial fair value of $202.9 and is recorded in the “Investment in unconsolidated affiliates” line in the Condensed Consolidated Balance Sheets. The Company’s interest is accounted for using the equity method of accounting, with the Company’s proportionate share of Bonnie Plants, LLC earnings subsequent to December 31, 2020 reflected in the Condensed Consolidated Statements of Operations. The estimated fair value of the loan receivable with AFC was determined using an income-based approach, which includes market participant expectations of cash flows over the remaining useful life discounted to present value using an appropriate discount rate. The fair value estimate utilized significant unobservable inputs and thus represents a Level 3 nonrecurring fair value measurement. On November 11, 2020, the Company entered into an agreement and plan of merger to acquire the remaining outstanding shares of AeroGrow for cash consideration of $3.00 per share, or approximately $20.1. The merger closed on February 26, 2021. Prior to closing, SMG Growing Media, Inc., a wholly-owned subsidiary of Scotts Miracle-Gro, was the holder of 80.5% of the outstanding shares of AeroGrow. The closing date carrying value of the noncontrolling interest was $6.7 and the $13.4 difference between the purchase price and carrying value was recognized in the “Common shares and capital in excess of $0.01 stated value per share” line within “Total equity—controlling interest” in the Condensed Consolidated Balance Sheets. On July 29, 2021, the Company’s Hawthorne segment entered into an agreement to acquire substantially all of the assets of Hydro-Logic Purification Systems, Inc., a leading provider of products, accessories and systems for water filtration and purification, for $65.0. The transaction, which is subject to customary closing conditions, is expected to close during the fourth quarter of fiscal 2021. On August 9, 2021, the Company entered into an agreement to make its initial investment under its strategic minority non-equity investment initiative in the form of a $150.0 six-year convertible note issued to the Company by Toronto-based RIV Capital Inc. (TSX: RIV) (OTC: CNPOF), a cannabis investment and acquisition firm currently listed on the Toronto Stock Exchange. The note accrues interest at 2 percent annually for the first two years and provides additional follow-on investment rights. The conversion feature, which is based upon the RIV Capital closing stock price on August 9, 2021, would provide the Company with approximately 42 percent ownership of RIV Capital if it were to be converted. The transaction is expected to close in the fourth quarter of fiscal 2021. The Company will also have the right to nominate up to three members for election to RIV Capital’s Board of Directors, which will be increased to seven members. The Company will not have an active day-to-day role in RIV Capital nor any of the companies in which it invests. RIV Capital has agreed to use the funds for general corporate and other lawful purposes, which could include acquisitions, and has agreed that the funds will not be used in connection with or for any cannabis or cannabis-related operations in the U.S. unless and until such operations comply with all applicable U.S. federal laws.