The basic idea is to plant sets of similar beans in your two bean fields, the more you have the more they are worth when you harvest them. You trade with other players in order to get the beans you need, as you have to play the cards in your hand in the order they are dealt. Also on your turn you have to plant your first bean card even if that means you have to harvest a bean field early in order to make room for it.
Once you have played your bean you turn over two more face up beans from the deck, you then have to trade, give away or plant these beans. It's a unique, simple and highly enjoyable mechanic making for very interesting games, though I would say this game plays better with 3 or more people.