A farm-themed party is especially popular around harvest time, which usually falls in autumn near Halloween, but these parties can be held year-round. Another popular farm-themed party is the Old McDonald children's party. Things to consider when planning your farm-themed costume are weather, appropriateness (if there are kids there, you might want to skip the revealing farmer's daughter look), uniqueness, and comfort. Stuffing yourself with hay is bound to get itchy after a while.
The obvious choice for a costume is the farmer. Wear denim overalls or jeans and a plaid shirt underneath. Put on a straw hat, cowboy boots, and maybe a big belt buckle. Put a sun-kissed look on your face with make-up because farmers are often sunburned from being in the sun all day. If you don't want to be the farmer, dress up as the farmer's wife. Wear a long dress or skirt, cinched tightly around your waist. Wear minimal make-up, part your hair down the middle and braid it on each side. Carry around a Bible as your prop. Or you can dress as a farmer's daughter who is known to be promiscuous. Wear a short denim skirt, a button-up plaid shirt that isn't buttoned all the way, and fancy cowboy boots. Put your hair in pigtails and wear bright make-up. Children love to dress up like cowboys and cowgirls, and they can carry a stick horse for a prop.
Every farm has animals, and the typical animals you might dress up as are horses, cows, mules, pigs, ducks, chickens, goats, sheep, dogs and cats. The horse is a great costume for two people--one person in the front and another in the rear. Be sure to exaggerate features like putting udders on a cow and making yourself look fat if you dress as a pig. Other animals you might see on a farm are wild animals like crows--which are known to eat crops--rabbits, coyotes and armadillos.
Flower, Fruit or Vegetable
You will stand out at the party if you dress as a flower or vegetable that you might find on a farm. Dress as a sunflower by wearing a green outfit and attaching felt flower petals to a headband. Common crops found on farms are corn, beets, tomatoes, peppers, carrots, and lettuce. You will be particularly interesting if you dress as a crop that is often found in your area. For example, if you live in California, dress as an artichoke. A good fruit costume is a grape bunch. Dress all in green, and then attach blown-up purple balloons to your clothes. To top it off, wear a green hat with twisted branches coming off it.