Although the shopping on St. Croix isn't as varied or extensive as that on St. Thomas, the island does have several small stores with unusual merchandise. St. Croix shop hours are usually Monday through Saturday 9 to 5, but there are some shops in Christiansted open in the evening. Stores are often closed on Sunday.
If you've rented a condominium or a villa, you'll appreciate St. Croix's excellent stateside-style supermarkets (albeit with prices that are at least 30% higher than on the U.S. mainland). Fresh vegetables, fruits, and meats arrive from the mainland frequently and are always available. Try the open-air stands strung out along Route 70 for island produce.