The main crop grown in Colombia are plantation crops such as,

1. Coffee.
2. Banana

Field crops,

1. Corn.

Vegetables crops,

1. Potato (Near hilly region).

• Well to start out with the country is spelled “Colombia” it's an innocent mistake of course. The biggest crop that is grown in Colombia by far is Coffee. Coffee is widely cultivated throughout the Andean region at around mid-level elevations. Other important crops are Potatoes, Soybeans, Tobacco, Corn, Palm Oil, Pineapples, Rice, Flowers, Quinoa, Blackberries, Sugarcane, Bananas and Cocoa. And of course there are some folks who also grow Coca for illegal export, but this has come under increased government scrutiny.
• Colombia is one of the most Fertile and Agriculturally Rich nations on the planet. It literally boasts the highest level of biodiversity per sqaure kilometer than any other place on Earth. The main reason for this wonderous biodiversity are the majestic Andes Mountains that traverse the country and create ideal microclimates for intense agriculture. The abundant rainfall, the rich volcanic soil, the bright sun, the cool mountain air and stable year-round temperatures are favorable for growing a wide variety of crops from Tropical to Temperate to Alpine. Almost everything grows in Colombia!
• Here are some pictures of typical Colombian countryside with it's famous Coffee Agriculture