Bangkok Flower Market (Pak Klong Talad) is the biggest wholesale and retail fresh flower market in Bangkok. The market has all kinds of popular flowers and flora-related items, including roses, forget me nots, orchids, lilies and more. Most of them sold in packs of 50 or 100 flowers in each, and prices are amazingly cheap. Part of the Old City, Bangkok Flower market is located on Chak Phet Road near Saphan Phut or the Memorial Bridge. Shops and vendors are housed inside two to three-storey shop-houses on both sides of the main road. The market lies just south of Wat Pho (Temple of the Reclining Buddha) and has access to a river pier, so it makes for a great one-day trip when combined with other historical attractions in the Old City.
Open 24 hours, Pak Klong Talad is most lively after midnight. If you want to see the market in full action, though, the best time to go is pre-dawn or at 3:00-4:00. This is when the roadside transforms into a kaleidoscope of bright, blooming colours, as vendors receive floral goods from each flower-growing area in the country. Wholesalers bring in truckloads of freshly cut flowers, while traders and retailers come to buy their stock in bulk. It can be quite a chaotic scene, and vendors may be less patient when dealing with visitors. If you go during this period, it’s best to just observe and absorb the surrounding atmosphere.
Pak Khlong Talat means “market at the mouth of the canal” and the area originally started as a floating market in the early 18th century (during the reign of King Rama I). Later, in the 19th century, the area became a large fish market. In the 1950s, when local authorities grew tired of the market’s fish smell permeating central Bangkok, flower and produce vendors were allowed to occupy the area, which eventually developed into the current Bangkok Flower Market.
See very nice photos from the market on this website.