Ash gekkouga cuts apart frenzy plant on Make a GIF Why are there spots on leaves of my houseplants? Chinese Rose (Rosa chinensis) Chinese roses have been used, cultivated, and bred in China for at least 2,000 to over 5,000 years, making them one of the oldest cultivated flowers in Spring gardens and houseplants can be beautiful, but some common plants may be toxic to pets if ingested. Curious pets may chew on leaves, flowers, or bulbs, which can lead to vomiting,