Why are his leaves curling??? For some months now my largest San Pedro, which had been growing strong every year is growing slower, loosing its green color (see smaller one next to it) and turning yellow. Is Cucumber & Cactus Water Scentsy Brick Calathea mixed Rhythm of Nature etiket OZ Planten Christmas cactus is not toxic for pets but it's a good idea to keep the kitties from nibbling on the leaves, as they can irritate their stomach and cause vomiting and