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Windmills are used in Harvest Moon DS: Grand Bazaar to make essential items used in Recipes or sold at the weekly Bazaar. Items such as Brooches, necklaces, and bracelets can be crafted with the second Windmill, which is by the Hotel. The First Windmill is used to ferment items such as milk to make cheese, and grapes to make wine. The windmills would even grind, and pack, tea to drink, sell, or give as gifts. The third, and last windmill, removes seeds from vegetables or other crops you insert into it and packs them into a seed bag to reuse, or make even more vegetables or fruits, crops that don't regrow would essentially be a waste of time to turn back into seeds, on the other hand, it would be wise with crops that do regrow to take them and turn them all back into seeds before the end of a season to be able to re-grow them when its season comes around again. Even buying a single pile of Fodder for cows and sheep can be turned into a field full of grass with enough time and determination.

Chestnuts, and other nuts can be peeled and packed into a can, or ground up to make the essential base for delicious desserts such as cookies.

Windmill 1: Fermenting

Fertilizer

1. Weed

1. Branch

Cheese

1. Milk

Good Cheese

1. Jersey Milk

Great Cheese

1. Golden Milk

Herb Cheese

1. Milk

1. Chamomile

Good Herb Cheese

1. Jersey Milk

1. Chamomile

Great Herb Cheese

1. Golden Milk

1. Chamomile

Yogurt

1. Milk

1. Mint

Good Yogurt

1. Jersey Milk

1. Mint

Great Yogurt

1. Golden Milk

1. Mint

Fruit Yogurt

1. Milk

1. Mint

1. Banana

1. Strawberry

1. Peach

Good Fruit Yogurt

1. Jersey Milk

1. Mint

1. Orange

1. Apple

1. Grape

Great Fruit Yogurt

1. Golden Milk

1. Mint

1. Muscat

1. Blueberry

1. Cherry

Butter

1. Milk

1. Oil

Good Butter

1. Jersey Milk

1. Oil

Great Butter

1. Golden Milk

1. Oil

Herb Butter

1. Milk

1. Chamomile

1. Oil

Good Herb Butter

1. Jersey Milk

1. Chamomile

1. Oil

Great Herb Butter

1. Golden Milk

1. Chamomile

1. Oil

Mayonnaise

1. Egg

1. Oil

Good Mayonnaise

1. Black Egg

1. Oil

Great Mayonnaise

1. Golden Egg

1. Oil

Herb Mayonnaise

1. Egg

1. Chamomile

1. Oil

Good Herb Mayonnaise

1. Black Egg

1. Chamomile

1. Oil

Great Herb Mayonnaise

1. Golden Egg

1. Chamomile

1. Oil

Miso

1. Soybean

1. Cooked Rice

Red Wine

1. Grape

White Wine

1. Muscat

Rose Wine

1. Grape

1. Muscat

Strawberry Wine

1. Red Wine

1. Strawberry

Tomato Wine

1. Red Wine

1. Tomato

Chicha

1. Corn

1. Yogurt

Pineapple Wine

1. White Wine

1. Pineapple

Peach Wine

1. White Wine

1. Peach

Banana Wine

1. White Wine

1. Banana

Orange Wine

1. White Wine

1. Orange

Cherry Wine

1. Cherry

1. Red Wine

Apple Wine

1. Red Wine

1. Apple

Blueberry Wine

1. White Wine
2. Blueberry

Honey Wine

1. Honey
2. White Wine

Chestnut Wine

1. Chestnut
2. White Wine

Beer

1. Wheat
2. Soybean

Champagne

1. Rose Wine

Pickled Turnip

1. Turnip
2. Olive Oil

Pickled Potato

1. Potato
2. Olive Oil

Pickled Cabbage

1. Cabbage
2. Olive Oil

Pickled Asparagus

1. Asparagus
2. Olive Oil

Pickled Onion

1. Onion
2. Olive Oil

Pickled Pumpkin

1. Pumpkin
2. Olive Oil

Pickled Radish

1. Radish
2. Olive Oil

Pickled Carrot

1. Carrot
2. Olive Oil

Pickled Spinach

1. Spinach
2. Olive Oil

Cauliflower Pickle

1. Cauliflower
2. Olive Oil

Pickled Eggplant

1. Eggplant
2. Olive Oil

Pickled Yam

1. Yam
2. Olive Oil

Pickled Pepper

1. Pepper
2. Olive Oil