Nakhon Nayok province
Sweet Plum Mango (Ma-prang, มะปราง) is the most well known fruit of Nakhon Nayok (it is a sweet fruit and is similar to "ma-yong-chit", a sour fruit).  The ma-prang harvest season February to March.  They are grown in a number of orchards on the Nakhon Nayok-Namtok Sarika road.