Question: are viburnums poisonous to dogs?
Answer: The ASPCA's Toxic and Non-Toxic Plant List – Dogs under "Plants Non-Toxic to Dogs" lists blackhaw or sweet viburnum (Viburnum lentago) as being safe, no viburnum species are listed under "Plants Toxic to Dogs". ... There are 6 species of native Texas viburnums and none of them are on any toxic plant list that I could find.