The ASPCA has lists of hundreds of plants, both toxic and non-toxic to dogs. To give you an idea of some plants that won't harm your dog, here goes: African violet, Begonia, Boston Fern, Callistemon, Camellia, Jade Plant, Bottlebrush, ********* cactus, Rhododendron, Hydrangea, Hibiscus, Lily of the Valley and loads more.