How you can store your avocados really depends on their stage of ripeness. Avocados that are almost but not quite ripe can remain in the refrigerator for up to two weeks. The cooler temperatures in the fridge will allow the avocados to ripen more slowly. When you're ready to make use of them, take them out of the refrigerator a day or two in advance. Exposure to room temperature will hasten the ripening process. The Hass avocado is densely packed with vitamins, minerals, and dietary fiber. Whether you want to give it a try or make it a regular part of your diet, put some Hass avocados into your cart on the Instacart app. Instacart shoppers will pick out deliciously ripe avocados for you, along with everything else you need in as little as 2 hours with same-day delivery!