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SEGMENT INFORMATION - Net Sales by Product Category (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2022 | Jan. 01, 2022
Revenue from External Customer [Line Items] |  |
Net sales | $ 526.6 | $ 566.0
U.S. Consumer |  |
Revenue from External Customer [Line Items] |  |
Net sales | 369.0 | 342.4
U.S. Consumer | Lawn care |  |
Revenue from External Customer [Line Items] |  |
Net sales | 145.4 | 123.8
U.S. Consumer | Growing media and mulch |  |
Revenue from External Customer [Line Items] |  |
Net sales | 97.1 | 80.0
U.S. Consumer | Controls |  |
Revenue from External Customer [Line Items] |  |
Net sales | 58.2 | 54.8
U.S. Consumer | Roundup® marketing agreement |  |
Revenue from External Customer [Line Items] |  |
Net sales | 20.3 | 20.8
U.S. Consumer | Other, primarily gardening |  |
Revenue from External Customer [Line Items] |  |
Net sales | 48.0 | 63.0
Hawthorne |  |
Revenue from External Customer [Line Items] |  |
Net sales | 131.5 | 190.6
Hawthorne | Lighting |  |
Revenue from External Customer [Line Items] |  |
Net sales | 50.3 | 48.8
Hawthorne | Growing environments |  |
Revenue from External Customer [Line Items] |  |
Net sales | 25.5 | 46.0
Hawthorne | Nutrients |  |
Revenue from External Customer [Line Items] |  |
Net sales | 22.8 | 35.9
Hawthorne | Growing media |  |
Revenue from External Customer [Line Items] |  |
Net sales | 17.8 | 29.9
Hawthorne | Other, primarily hardware |  |
Revenue from External Customer [Line Items] |  |
Net sales | 15.1 | 30.0
Other |  |
Revenue from External Customer [Line Items] |  |
Net sales | 26.1 | 33.0
Other | Lawn care |  |
Revenue from External Customer [Line Items] |  |
Net sales | 2.6 | 2.6
Other | Growing media |  |
Revenue from External Customer [Line Items] |  |
Net sales | 15.4 | 15.0
Other | Other, primarily gardening and controls |  |
Revenue from External Customer [Line Items] |  |
Net sales | $ 8.1 | $ 15.4

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