Fireflies help gardens by eating pests like slugs and snails, and they also act as pollinators. To attract fireflies, let parts of your yard grow wild with tall grass, leaf litter, and native plants.

It’s the last day of June and I’m standing under the overhang on my back deck protected from the last drips of a rainstorm. It’s past nine o’clock but not quite dark yet. But the yard is starting to ...