evidence: There are some plants that have the ability to live up to a century before blooming, but a widely circulated post on social media also claims that there is a rare Himalayan flower that still has a spectacular growth period. Item: bloom only once in 400 years. [...] In November 2019, an Instagram user declared the image of the Rheum nobile tree to be "the Mahameru flower that blooms once in 400 years in the Himalayas", adding that those blessed to see the tree in bloom will receive "good luck". good luck for a lifetime". [...] Thereby, Professor Stöcklin said that the statement "flowers bloom once every 400 years" is untrue.