The 55-acre expanse of the San Francisco Botanical Garden in Golden Gate Park is bound to be awash in color at any time, given the 8,000 varieties of plants, flowers and trees from around the world coming in and out of bloom over the course of a year. But beginning this weekend, from Friday through Tuesday, there will be a special and ephemeral budding of black-on-white, as in ebony and ivory, as the annual musical extravaganza known as Flower Piano again invites lovers of both music and nature to stroll the garden grounds — stopping to smell the flowers and tune in to some lovely strains of sound.
