My poor Monstera the leaves were going black and dropping and I hadn't watered it for a while because I thought I had overwatered it. I checked soil at the bottom and Sago palms are one of the most common landscaping plants in Houston, and one of the most dangerous. Every part of the plant is toxic, including the leaves, roots, and seeds. The Peace Lily Elegant Easy Care Indoor Plant Basic Karma Are Philodendrons Toxic to Cats? Signs & 24 Hour Plan