To learn more about Good Host Plants to go https://www.goodhostplants.com/

To go down the rabbit hole and explore native plants visit: 

https://mtcubacenter.org/

http://www.bonap.org/

https://homegrownnationalpark.org/

https://www.xerces.org/

https://extension.psu.edu/pennsylvania-native-plants-for-the-perennial-garden

https://www.wildflower.org/collections/collection.php?collection=PA

https://www.brandywine.org/conservancy/blog/top-10-power-plants

https://extension.psu.edu/programs/master-gardener/counties/york/native-plants/fact-sheets/butterfly-larval-host-plant-list

https://pa.audubon.org/conservation/diy-garden-designs

https://www.dcnr.pa.gov/Conservation/WildPlants/LandscapingwithNativePlants/NativeGardenTemplates/Pages/default.aspx

And some of John Janick’s favorite resources: 

https://www.illinoiswildflowers.info/

Native Alternatives to Invasive Plants by C. Colston Burrell published by the Brooklyn Botanic Garden

If you want more information about local sustainability go to https://www.greenphl.org