ZZ Plant Care & Tips - Zamioculcas Zamiifolia [origin: East Africa]. Unllike many other house plants, it almost thrives on neglect, & needs less water than other houseplants. OVER watering will kill it. Make sure to use a soil mix with GOOD DRAINAGE: cactus mix, or regular potting soil with sand or perlite. NOTE: All parts of the plant are highly TOXIC to humans or animals if ingested!