I recently found out about the karner blue butterfly, which has been extirpated from Ontario due to the near-extirpation of its host plant, sundial lupine. I was thinking, could gardeners bring this butterfly back to Ontario? If everybody in suitable habitat planted some sundial lupine in their garden, would we be able to bring the karner blue back into its former range?
So then, I thought about what other similar cases there are out there. What other at risk insects can be brought back through planting specific plants? Are there any at risk plants that would benefit from being planted in gardens? I tried looking into this topic, and was able to find practically no information on gardening to protect endangered plants and insects. I would’ve thought that conservation authorities would want to enlist the help of willing gardeners to help out in conservation efforts, but that doesn’t seem to be the case. Does anyone know why there doesn’t seem to be any info on the topic, or know where that info is hiding?