Blossom festival in Wang Nam Khiao takes place every year in cold season, somtime between December and January, depends on the weather and blooms. The festival aims to present the beautiful bloom from local gardens in the area.
There's also some other activities, food fair, local performance, some years they even have fun park.
The flower called in thai "Benjamas" usually in full bloom in cold season, as beautiful as you can see on the photos. I attend the festival almost every year. The festival takes place in Thai-Samakkee sub-district, Wang Nam Khiao District, around 80 kms from Korat City. To get there, take highway no. 304 from the City.