White there are some houseplants that are toxic to cats, orchids are safe. It is not advisable to allow cats to ingest flowers and houseplants, but orchids do not cause them harm. Pesticides or fertilizers used on plants could cause harmful side effects.
Though many houseplants, including orchids, bamboo and Christmas cactus, are non-toxic for cats, it is still best to keep curious felines away from houseplants and fresh cut flowers. Pesticides and fertilizers used on plants can be dangerous. An easy way to keep even more curious cat away from houseplants is to sprinkle a small amount of cinnamon or cayenne on the leaves.