Avocados generally ripen within two to three days after you purchase them, but you can slow down the ripening process if you do not plan to use them soon. If you need to use the avocado sooner, you can speed up the ripening process so that the avocado feels soft and has a darker green appearance.
Select avocados that are light green and firm. Store the avocados in the refrigerator in the produce drawer.
Keep the avocados in the refrigerator for three to five days. The refrigerator helps to slow down the ripening.
Remove the avocados from the refrigerator two days before you plan to prepare them. Place them in a warm location so that they will ripen fully. If you need the avocados to ripen faster, store them in a brown paper bag with a ripe banana.