Whether or not you go inside the Museum of Fine Arts, on the front lawn you will find rich offerings by artists and curators attentive to soil, sun, sea, community, and history. One morning in early August, I joined other visitors enthralled by plantings and perspective in the collaborative venture called “Garden for Boston.” Delighted by discoveries, I’ll share a few of my iPhone photos with quotes from enlightening resources on the MFA website and other specified links.