While it may be tempting to shuck corn on the cob while still in the grocery store, doing so may be hazardous to this veggie’s nutrient content. Better to buy and store corn in the husk, then shuck it (i.e., pull back and remove the husks) right before cooking. If you will not be using it immediately, store corn in the refrigerator for up to 5 days. The corn is past its prime if the silks turn brown or dark.