Sat 9/26 Open Days: Carlisle and Lexington MA
Garden Conservancy open days for two gardens. One in Carlisle, MA and one in Lexington MA. You could combine the Carlisle trip with a visit to several good garden nurseries:
-R. Seawright Daylilies and Hostas
Plus a visit to the Carlisle Kimballs ice cream stand.
Here is a link that might be useful: Garden Open Days Massachusetts