This novel and fascinating plant has bright yellow flowers which open in the morning before suddenly closing at midday, hence its common name of "Jack-go-to-bed-at-noon". But then the surprise happens! The previous day's enormous and impressive, apple-sized, "dandelion clock" opens with large radiating seeds, from huge ripe buds. It can self-seed if happy, but only in a small way.
For best results, sow immediately onto a good soil-based compost. Cover the seeds with fine grit or compost to approximately their own depth. They can be sown at any time, and germination can sometimes be quicker if kept at 15 to 20 degrees C. We sow most seeds in an unheated greenhouse and wait for natural germination, as many seeds have built-in dormancy mechanisms, often waiting for natural spring germination, hence giving them a full season of growth.
Common name:Meadow Salsify,"Showy goat's beard".