Things You'll Need. Sink a papyrus plant's container in a pond or other water feature so that the container's top is up to 12 inches beneath the water surface, or grow the plant directly in boggy, wet soil near the margin of an outdoor pond.
Ham should not sit at room temperature any longer than 2 hours.
Quick Answer. An article in the New York Times states that four hours is the maximum time that cooked meat should sit at room temperature. The USDA recommends two hours but cuts that to one hour when temperatures are over 90 F. Continue Reading.