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.
Cooked eggs can sit out at room temperature for about the length of  the day. The eggs will need to be refrigerated if they will not be  eaten in 24 hours.