Rhaphidophora tetrasperma can dry out almost completely between waterings. Do not overwater this plant; if it sits in standing water for too long, your plant will not survive. They will most likely get root rot disease because their root system has taken in too much water for the plant to handle. If you are unsure if you should water your plant, it is best to hold off another day or two. These houseplants can go weeks before needing to be watered again.