You cant.
No, however you can buy farmville coins for cash.
You buy it with Farmville coins.
You grow easy crops to get coins or you buy the crops that take a long time to come in because they are worth alot of coins or you can buy coins for farmville
Buy using the FarmCash or Coins that you have. Just go through the Farmville market.
You go to market then go to farming aides, choose your expansion then buy with farmville coins or cash.
You have to buy them with real money.Have you tried perusing the strategy book at http://learn.to/be-a-farmville-pro ?
When you are plowing the ground on Farmville,the coins that appear are for plowing it. It also gives you some coins so you can buy seeds.The gold coins that sometimes appear when you are plowing gives you 100 coins.
Unfortunately you cannot. Farmville money comes only from true money via credit cards or Retail Stores such as CVS, Walgreen, Best-Buy, and Walmart.
You cannot buy ribbons, you have to earn them.
Farmville, is a free game, unless you want to buy extra coins, and farmcash, than you have an option of buying it.
You can expand now but you must;Be a fan of the FarmVille pageHave 30 neighboursAnd have 250,000 spare coins. (To buy it with.)
harvest , sell , also actually buy it with real money