He is known as a grower of organic vegetables.
この地域では、多くの栽培者が米を作っている。
In this region, many cultivators grow rice.
生産者 is a more general term for 'producer' (including manufacturers), whereas 栽培者 is limited to agricultural cultivation.
orchardist; fruit grower
Compound of 栽培 (cultivation) + 者 (person). The word follows a common pattern for forming agent nouns in Japanese.