When will the smiling flowers bloom?

Bananashrub (scientific name Micheliafigo)

Smiling flowers are evergreen shrubs or small trees of Magnoliaceae and Michelia, also known as Michelia, Michelia, Michelia or Musa. The last nickname is banana, which comes from its rich fragrance and is slightly ripe. The English word Bananashrub is literally translated as banana shrub, but in fact, in plant classification, smiling flowers are far from banana trees. Suitable for slightly acidic soil with pH value of 5.0 ~ 5.5. The plant height is about1~ 2m. The stem is slightly rough due to tiny verrucous processes, the bark is grayish brown, and there are yellowish brown fine villi on the buds, young branches and midvein on the back of leaves. Leather is smooth, and the leaves with alternate whole edges are oval or oval; Erect flowers are solitary in leaf axils, bloom in March-May, and the flower diameter is about 2-3 cm. There are usually six ivory or light yellow petals, which are often slightly open and drooping, showing a "beautiful smile". Because their buds are like plums, Sichuan and neighboring provinces of Chinese mainland call them "smiling plums".