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.
four hours is the maximum for any food at room temperature.     Another perspective   Four hours is too long. Potentially hazardous food should not be left out mâ¦ore than 2 hours. If the ambient temperature is around 90Â°F, cut that to 1 hour. The US Food Code recommends that potentially hazardous food be cooled from 140Â°F to 70Â°F within 2 hours, then further chilled to 40Â°F within another 4 hours.