Asparagus is commonly sold in bundles of about 1 lbs standing upright in a tray of water. Choose fresh looking, firm spears with tight tips. Smell them first to make sure that don’t give off any unpleasant oder, if they do they are old. Check the cut of the ends of the stalks; they should be moist, not dried out. If dried ends are all that is available, then cut about 1/2” off the Botton when you get home under running water. To make sure they keep fresh, stand asparagus bundles in about 1” of water in a jar or a shallow tray and keep them in the refrigerator. Cook the spears within 2 to 3 days of purchase!