﻿<?xml version="1.0" encoding="utf-8"?>
<Return returnVersion="2025v4.0" xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2026-03-29T16:14:23-07:00</ReturnTs>
    <TaxPeriodEndDt>2025-12-31</TaxPeriodEndDt>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2025-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>911148165</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>MASTER GARDENER FOUNDATION OF WASHINGTON STATE</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>MAST</BusinessNameControlTxt>
      <PhoneNum>5098331509</PhoneNum>
      <USAddress>
        <AddressLine1Txt>205 W Washington Ave Unit 10533</AddressLine1Txt>
        <CityNm>YAKIMA</CityNm>
        <StateAbbreviationCd>WA</StateAbbreviationCd>
        <ZIPCd>98903</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Gilbert Plascencia</PersonNm>
      <PersonTitleTxt>Treasurer</PersonTitleTxt>
      <PhoneNum>5098331509</PhoneNum>
      <SignatureDt>2026-03-29</SignatureDt>
    </BusinessOfficerGrp>
    <TaxYr>2025</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="R000001" referenceDocumentId="R000003" softwareId="25022730" softwareVersionNum="v1.00">
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>mastergardenerfoundation.org</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="R000002">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>137671</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>39068</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>57024</ProgramServiceRevenueAmt>
      <MembershipDuesAmt>0</MembershipDuesAmt>
      <InvestmentIncomeAmt>4311</InvestmentIncomeAmt>
      <SaleOfAssetsGrossAmt>0</SaleOfAssetsGrossAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <GainOrLossFromSaleOfAssetsAmt>0</GainOrLossFromSaleOfAssetsAmt>
      <GamingGrossIncomeAmt>0</GamingGrossIncomeAmt>
      <FundraisingGrossIncomeAmt fndrsngEventContriPrevRptAmt="0">0</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>0</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>0</SpecialEventsNetIncomeLossAmt>
      <GrossSalesOfInventoryAmt>0</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>0</GrossProfitLossSlsOfInvntryAmt>
      <OtherRevenueTotalAmt>37268</OtherRevenueTotalAmt>
      <TotalRevenueAmt>137671</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>0</GrantsAndSimilarAmountsPaidAmt>
      <BenefitsPaidToOrForMembersAmt>0</BenefitsPaidToOrForMembersAmt>
      <SalariesOtherCompEmplBnftAmt>0</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>0</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>0</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>0</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>109415</OtherExpensesTotalAmt>
      <TotalExpensesAmt>109415</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>28256</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>148214</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>1015</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>177485</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>122461</BOYAmt>
        <EOYAmt>144534</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <LandAndBuildingsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LandAndBuildingsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>31358</BOYAmt>
        <EOYAmt>33562</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>153819</BOYAmt>
        <EOYAmt>178096</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>5605</BOYAmt>
        <EOYAmt>611</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>148214</BOYAmt>
        <EOYAmt>177485</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>TO SUPPORT THE WSU EXTENSION MASTER GARDENER PROGRAM IN ITS EFFORTS TO PROVIDE PUBLIC EDUCATION IN GARDENING AND ENVIRONMENTAL STEWARDSHIP THROUGH STATEWIDE UNIFYING LEADERSHIP TO, AND COMMUNICATION AMONG WSU MASTER GARDENER PROGRAMS AND RELATED MASTER GARDENER FOUNDATIONS.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>2025 MASTER GARDENER ADVANCED EDUCATION CONFERENCE - PROVIDING CONTINUING EDUCATION TO MASTER GARDENERS FROM THROUGHOUT WASHINGTON STATE.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>40932</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>40932</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>TANA HASART</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>10</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>CATHI LAMOREUX</PersonNm>
        <TitleTxt>VICE PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOHN STRONG</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JENNIFER MARQUIS</PersonNm>
        <TitleTxt>WSU STATE PROGRAM COORDINATOR - EX-OFFICIO</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>GILBERT PLASCENCIA</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>4.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <Form1120PolFiledInd>0</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>WA</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>GILBERT PLASCENCIA</PersonNm>
        <USAddress>
          <AddressLine1Txt>205 W WASHINGTON AVE UNIT 10533</AddressLine1Txt>
          <CityNm>YAKIMA</CityNm>
          <StateAbbreviationCd>WA</StateAbbreviationCd>
          <ZIPCd>98903</ZIPCd>
        </USAddress>
        <PhoneNum>5098331509</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>0</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>1</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="R000002" softwareId="25022730" softwareVersionNum="v1.00">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>5772</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>11743</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>35075</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>32121</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>39068</CurrentTaxYearAmt>
        <TotalAmt>123779</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsNonUnrltBusGrp>
        <CurrentTaxYearMinus4YearsAmt>55030</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>75687</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>100996</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>78889</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>57024</CurrentTaxYearAmt>
        <TotalAmt>367626</TotalAmt>
      </GrossReceiptsNonUnrltBusGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>60802</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>87430</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>136071</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>111010</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>96092</CurrentTaxYearAmt>
        <TotalAmt>491405</TotalAmt>
      </Total509Grp>
      <PublicSupportTotal509Amt>491405</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>245</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>235</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>651</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1701</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>4311</CurrentTaxYearAmt>
        <TotalAmt>7143</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>245</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>235</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>651</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1701</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>4311</CurrentTaxYearAmt>
        <TotalAmt>7143</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>61047</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>87665</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>136722</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>112711</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>100403</CurrentTaxYearAmt>
        <TotalAmt>498548</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.98567</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.99251</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.01433</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00749</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleO documentId="R000003" softwareId="25022730" softwareVersionNum="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>Description;Amount^Asotin Garfield Chapter Income;6869|Kittitas Chapter Income;11392|Pend Oreille Chapter Income;19007^Total;37268^</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>Description;Amount^2025 Advance Education Conference Expenses;40932|Annual Awards;451|Appreciation Gifts;150|Bank and Credit Card Fees;229|Foundation Website Open Labs;4454|Podcast Expenses;280|Insurance;1719|License and Registration Fees;420|Office Supplies;138|Professional Fees;3931|Service Subscription Fees;997|Event Sponsorships;3000|NWFGF Booth and Related Expenses;9726|WSU MG Endowed Fund;5674|Asotin Garfield Chapter Expenses;6872|Kittitas Chapter Expenses;7785|Pend Oreille Chapter Expenses;22422|Investment Fees;235^Total;109415^</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>Description;Amount^Unrealized gains on investments;1015^Total;1015^</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>Description;EOY Amount^YVCF Agency Capacity Fund;33562^Total;33562^</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 26</FormAndLineReferenceDesc>
        <ExplanationTxt>Description;EOY Amount^Accounts Payable;611^Total;611^</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>