At the historic mansion site, the second rain garden is also a registered butterfly sanctuary. I had seen it on my personal walk-through a week ago. Yesterday it was confirmed as both the south rain garden and the butterfly sanctuary.


I spent hours yesterday evening pouring over a treasure – the schematics from the initial planting of the rain gardens, as well as the initial inventory/buy list. That was done in 2005, when the city took over the site, a new roof was put on the mansion, and the parking lot was put in. Makes sense – add a parking lot, offset runoff of that hard surface and potential chemicals, with rain gardens.
What went into the rain gardens was, as I expected, a lot of sedge and grasses. Other things too – honeysuckle, daylilies … From outward appearances it looks like the sedge and grasses have been very successful. Some research on sedge and other grasses yielded information that it is not just nectar that is needed in a butterfly garden. Caterpillars use the sedge and grasses environment. I need to dive a bit deeper on that to understand – should I then trim the sedge and grasses? They do seem a bit voluminous, but then maybe that is exactly what the caterpillars thrive on.
I fought myself on where to start, as the south rain garden/butterfly sanctuary is the closest to the entrance, but I really do want to see what survived in there for the butterflies before I start trimming there. It also looks like a lot of daylilies might be in there.
So the north rain garden gets a haircut first. The goal will be to start on the edges and gradually move in.
This will be a long-haul project, with layers of understanding and discovery. Perfect!
