<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:30e12ce0-0757-477c-9a06-2631318deedd,g:29175197-9bdb-47d8-87d8-bb116e592c27-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.scotts.com/role/DocumentandEntityInformationDocument" xlink:type="simple" xlink:href="smg-20250428.xsd#DocumentandEntityInformationDocument"/>
  <link:definitionLink xlink:role="http://www.scotts.com/role/DocumentandEntityInformationDocument" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_1388388f-2df9-4bc1-8e91-301e982b6034" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntitiesTable_1388388f-2df9-4bc1-8e91-301e982b6034" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_6d517554-8055-44e1-a185-b954269e4c21" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_1388388f-2df9-4bc1-8e91-301e982b6034" xlink:to="loc_dei_LegalEntityAxis_6d517554-8055-44e1-a185-b954269e4c21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6d517554-8055-44e1-a185-b954269e4c21_default" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_6d517554-8055-44e1-a185-b954269e4c21" xlink:to="loc_dei_EntityDomain_6d517554-8055-44e1-a185-b954269e4c21_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_febe9129-534d-414e-9b2e-ae2b9cf28005" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_6d517554-8055-44e1-a185-b954269e4c21" xlink:to="loc_dei_EntityDomain_febe9129-534d-414e-9b2e-ae2b9cf28005" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_fb371acd-c879-47cb-ae5a-0a2fe1e6f1cc" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityCentralIndexKey_fb371acd-c879-47cb-ae5a-0a2fe1e6f1cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_4db05740-523d-498d-b90c-efded00e422f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_AmendmentFlag_4db05740-523d-498d-b90c-efded00e422f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_f02cf2bf-8fda-4210-8cf4-90d9c6d167c8" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityEmergingGrowthCompany_f02cf2bf-8fda-4210-8cf4-90d9c6d167c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_6d3d2801-cff4-45e5-84f5-7cc907c030a9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_TradingSymbol_6d3d2801-cff4-45e5-84f5-7cc907c030a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_5bdaf842-66e9-41ef-be89-a1dd8dd18fbf" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_Security12bTitle_5bdaf842-66e9-41ef-be89-a1dd8dd18fbf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_ec6d1e97-a0c6-42af-8116-2a45a149ad66" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_ec6d1e97-a0c6-42af-8116-2a45a149ad66" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_56520b82-9f54-4eee-8c47-f386ad3d0e01" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_PreCommencementTenderOffer_56520b82-9f54-4eee-8c47-f386ad3d0e01" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_2afa13e7-c528-4405-b7ca-c1add536164c" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_SolicitingMaterial_2afa13e7-c528-4405-b7ca-c1add536164c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_c4382daa-738a-4be7-a78a-500de24627aa" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_WrittenCommunications_c4382daa-738a-4be7-a78a-500de24627aa" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_965de0fc-5b48-40ce-ae8a-e64fa5f92b3d" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_LocalPhoneNumber_965de0fc-5b48-40ce-ae8a-e64fa5f92b3d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_f0c553c7-2432-4728-aab7-5eace62dbe07" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_CityAreaCode_f0c553c7-2432-4728-aab7-5eace62dbe07" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_09f09f71-c2ce-4c75-aeff-d0cb1ed216e3" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityAddressPostalZipCode_09f09f71-c2ce-4c75-aeff-d0cb1ed216e3" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_4d373d39-11b7-483b-877d-a0aaebec5aab" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityAddressStateOrProvince_4d373d39-11b7-483b-877d-a0aaebec5aab" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_06e2c695-e500-4c2f-b53b-4e9e7bc7731c" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityAddressCityOrTown_06e2c695-e500-4c2f-b53b-4e9e7bc7731c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_89394317-59b1-4a79-9a62-a290675db692" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityAddressAddressLine1_89394317-59b1-4a79-9a62-a290675db692" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_349b60db-345c-4490-b411-2e9ad6c508b1" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityTaxIdentificationNumber_349b60db-345c-4490-b411-2e9ad6c508b1" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_f1fe59ac-e62d-4b43-8970-4453530119f7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityFileNumber_f1fe59ac-e62d-4b43-8970-4453530119f7" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_204b6255-fb12-415f-a09d-941ef03a5695" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityIncorporationStateCountryCode_204b6255-fb12-415f-a09d-941ef03a5695" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_d029cb87-1e62-4e26-bfc4-0f13d9011689" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_EntityRegistrantName_d029cb87-1e62-4e26-bfc4-0f13d9011689" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_20cec92f-c249-4357-a0ea-cf4e8e65a926" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_DocumentPeriodEndDate_20cec92f-c249-4357-a0ea-cf4e8e65a926" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_8d63400a-c9a8-4b48-87fb-b6066415e808" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_DocumentType_8d63400a-c9a8-4b48-87fb-b6066415e808" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_42260326-e3ae-4994-b51d-bb759d580cec" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_474aa531-9405-46f5-89bb-621e6c61d1f4" xlink:to="loc_dei_SecurityExchangeName_42260326-e3ae-4994-b51d-bb759d580cec" xlink:type="arc" order="21"/>
  </link:definitionLink>
</link:linkbase>
