Green – Green asparagus gets its color from the process of photosynthesis as the stalk comes out of the ground into the sunlight. This type of asparagus should be a bright green color with purple patches. White – White asparagus is the same as green asparagus except that it is grown in the dark, so there is no color development from photosynthesis. Because it is grown more artificially (without access to direct sunlight), this type of asparagus is usually more expensive. Purple – Purple asparagus is a different variety altogether. It derives its color from high levels of antioxidants in the stalks and has a lower fiber content than the green or white variety. This distinction makes purple asparagus tenderer and sweeter tasting.
Try putting the asparagus in a plastic bag before you put it in the refrigerator.
Put a plastic bag over the top of the asparagus and put it in the refrigerator. If the water starts to get cloudy, pour it out and replace it with fresh water. This will help your asparagus last many days longer.
