| Rensselaer Urban Forestry Council IncRensselaer | Form 990-N | No figure |
| Covered Bridge Gateway Trails Association IncRockville | Form 990-N | No figure |
| St Joseph River Association IncElkhart | Form 990-N | No figure |
| Lake County Master Gardeners Association IncCrown Point | Form 990-N | No figure |
| Johnson Co Garden ClubFranklin | Form 990-N | No figure |
| Keep New Albany Clean and GreenNew Albany | Form 990-N | No figure |
| Putnam County Master Gardener AssociationGreencastle | Form 990-N | No figure |
| Kennedy Park Neighborhood Association IncSouth Bend | Form 990-N | No figure |
| Southeastern Indiana Beekeepers AssociationBrookville | Form 990-N | No figure |
| Muncie Clean City IncMuncie | Form 990-N | No figure |
| Stockbridge Audubon Society IncFort Wayne | Form 990-N | No figure |
| Central Indiana Technical and Environmental Society IncMartinsville | Form 990-N | No figure |
| Owen County Garden ClubPoland | Form 990-N | No figure |
| Randolph County Invasive Species ExterminatorsWinchester | Form 990-N | No figure |
| Friends of the RBNP IncBloomington | Form 990-N | No figure |
| Return to Vital Roots IncNew Albany | Form 990-N | No figure |
| Bass Illinois Railroad Quiet Zone CompanyFort Wayne | Form 990-N | No figure |
| Newark Cemetery Fund CoSolsberry | Form 990-N | No figure |
| East Central Indiana Recycling and Reuse Hub CorporationRichmond | Form 990-N | No figure |
| Indiana Composting Council IncCarmel | Form 990-N | No figure |
| Fort Wayne Water Foundation IncFort Wayne | Form 990-N | No figure |
| Recycle-HKWhitestown | Form 990-N | No figure |
| Waubee Lake Association IncMilford | Form 990-N | No figure |
| New Ross Conservation Club IncNew Ross | Form 990-N | No figure |
| Woodlawn Nature Council IncElkhart | Form 990-N | No figure |
| Wolf Park IncBattle Ground | Form 990-N | No figure |
| United Citizens Association IncWhiting | Form 990-N | No figure |
| Sycamore Audubon SocietyWest Lafayette | Form 990-N | No figure |
| Dunes-Calumet Audubon Society IncWheeler | Form 990-N | No figure |
| Stone Lake Conservation Club IncMiddlebury | Form 990-N | No figure |
| Bremen Conservation Club IncBremen | Form 990-N | No figure |
| Hoosier Heartland Resource Conservation and Development CouncGreenwood | Form 990-N | No figure |
| Winona Lake Preservation Association IncWarsaw | Form 990-N | No figure |
| Indiana Daylily-Iris Society IncGreenwood | Form 990-N | No figure |
| Potawatomi Audubon SocietyMichigan City | Form 990-N | No figure |
| Wabash Valley Herb Society IncTerre Haute | Form 990-N | No figure |
| Indianapolis Hosta Society IncIndianapolis | Form 990-N | No figure |
| Friends of Sugar Creek IncCrawfordsville | Form 990-N | No figure |
| Little Turtle Waterway CorporationLogansport | Form 990-N | No figure |
| McCutchanville Garden Club IncEvansville | Form 990-N | No figure |
| Shipshewana Community Lake Improvement Association IncShipshewana | Form 990-N | No figure |
| Marion County Master Gardener AssociationIndianapolis | Form 990-N | No figure |
| Indiana Organic Growers IncTipton | Form 990-N | No figure |
| Indiana Cave Survey IncIndianapolis | Form 990-N | No figure |
| Sustainable Earth IncLafayette | Form 990-N | No figure |
| Batesville Beautification League IncBatesville | Form 990-N | No figure |
| Friends of MeteaGrabill | Form 990-N | No figure |
| Indiana Lakes Management Society IncAngola | Form 990-N | No figure |
| Hoosier Releaf IncFort Wayne | Form 990-N | No figure |
| Hoosier Organic Marketing Education IncBloomington | Form 990-N | No figure |