When garlic is a little bit green it’s nothing to worry about; it’s just the start of the sprout. Those who have green garlic will want to use them as quickly as possible before they start to really go bad. All you have to do is peel and crush the garlic at the same time with a knife so it will be ready to be eaten or used in a dish that you are making.
Those who have garlic that are green in the center though will not want to use them. You can avoid having your garlic going bad by putting them in the refrigerator as soon as you get home from the supermarket. By properly storing your garlic you will be able to avoid having it go bad altogether.