ZZ plants’s are a safe plant despite being part of the Philodendron family which contains calcium oxalate crystals in the plant that can irritate various sensitive skin parts. The belief that it is an extremely poisonous plant is just not true. And no, it doesn’t cause cancer.Click to see full answer. Keeping this in view, is zamioculcas Zamiifolia toxic?Zamioculcas zamiifolia (Araceae) is native to east Africa and is generally grown as indoor ornamental plant. It has air purifying qualities for indoor environment. The plant has the ability to remove the volatile compounds from indoor environment. The scientific researches have proved that plant is not poisonous. do ZZ plants clean the air? Its ability to remove airborne toxins by transpiring at a high rate makes it a favorite indoor plant. ZZ Plant – The Zamioculcas zamiifolia is one of the toughest indoor plants out there. They are able to thrive in areas with both low and high amounts of light. The ZZ plant removes Toluene and Xylene from indoor air. Keeping this in consideration, what plant can cause cancer? Above: A ZZ plant growing on Maui. Photograph by Forest and Kim Starr via Flickr. ZZ’s one major drawback is that all parts of the plant are poisonous. In fact, during the 2010s there were false rumors that ZZ was so toxic that the plant caused cancer, and was so dangerous that people wore gloves when handling it.Does ZZ plant bloom?ZZ plants are known as flowering plants, but they very rarely produce flowers. Instead, the plant is known for its wide, dark green leaves. They can make great desk plants or floor plants and can grow quite tall if left alone. The leaves can be 40-60 cm long.