It’s a very unusual song, both musically and lyrically. The lyrics are dreamy, poetic, iconic and illuding to lore.
“Amongst the garbage and the flowers”
That would be Leonard Cohen, I'm Your Man, Cohen. deep and painfully honest. Suzanne ended up as a homeless woman near Sunset Beach, CA, last I heard. And then compare two songs about Janis Joplin, Cohen's Chelsea Hotel (he would later apologize for being so honest) with Garcia's fabulous acoustic verson of Bird Song (bearing in mind that Grateful Dead member Ron "Pigpen" McKernan also was a lover of Janice Joplin's for a time). .
In any case, all three of these deserve a hearing, so to speak.