Cast Iron Plant vs ZZ Plant

Side-by-side comparison.

Cast Iron PlantZZ Plant
DifficultyBeginnerBeginner
LightLow to bright indirect light (tolerates low light)Low to bright indirect light; tolerates low light
WaterWater when top inch of soil is dry, typically every 1-2 weeksAllow soil to dry completely between waterings, about every 2-3 weeks
Humidity40-50% (average household)30-50% (average household)
Mature size2-3 ft tall indoors2-4 ft (60-120 cm) indoors
Pet-safe?Yes (non-toxic to cats and dogs)Toxic to cats and dogs