How long does St John’s wort bloom?

St John’s wort (Hypericum perforatum) blooms from June to September, with the flowers lasting for only a few days before the petals drop off. The flowers are typically yellow or a yellowish-orange and have five petals. The plant grows to a height of between 30 and 90 cm, with a spread of up to 60 cm. St John’s wort is a perennial herb and can be found in many parts of the world, including North America, Europe, and parts of Asia.