This will let you hang your butterfly feeder up. Make a small hole in the bottom of the cup using a pencil or similar object. Push a small piece of sponge through the hole and pull it through just ...
There are many larval host plants, so you can research which ones grow naturally in your USDA ... swallowtail caterpillars.
The best way to help butterflies is to grow butterfly-friendly plants that will provide nectar to adults and food to caterpillars. Check out our article on how to attract butterflies to your garden ...