In nature, these plants mostly grow in the tropical and sub-tropical climates, where it rains a lot. These "urn" plants get there nutrients from what collects in their leaves. If you simply pour a lot of water into the "urn", it will flush the old water out. Heck, I water all mine with a hose. As long as your plants are in well-draining soil, and not sitting in water, I doubt you could over-water if you tried. LOL
