A group of musicians has given their first performance - to an audience of potted plants.They took to the stage after a Spanish opera house reopened its doors first time over three months since lockdown.The concert was hosted yesterday at the Gran Teatre del Liceu opera house in Barcelona where a string quartet played to 2,292 plants in the neo-classical theatre.It was also livestreamed on the opera house's YouTube channel to human audience.Video shared on social media shows the strings players – two violin players, a viola player and a cellist – play the beautiful piece "Chrysanthemum" by Italian composer Giacomo Puccini.The plants, which were donated by local nurseries, have filled up the red-cushioned seats on all six levels of the.