The lotus is one of the beautiful symbols of serenity, peace, and tranquility. In Hue, the lotus blooming season usually begins in May and June, when the weather changes into hot and sultry days. This time also coincides with April of the Lunar year, the time marked with the significant event of the Grand Buddhism Celebration (Vesak).

Inherently being called a regal flower associated with the image of the Nguyen Dynasty in Hue, the annual blooming season of Firmiana simplex (also known as Chinese parasol) flowers is in late March and April, creating picturesque images in the space of Hue Imperial Citadel.