Selecting the right plants is crucial for attracting butterflies to your indoor garden. Opt for nectar-rich flowers such as milkweed, butterfly bush, zinnias, and marigolds. These plants provide a food source for adult butterflies. Additionally, include host plants like parsley, dill, and fennel, which serve as food for caterpillars. By offering a variety of plants, you can create a diverse and inviting habitat for butterflies.