Harmful Spring plants keep these plants well out of the reach of your dogs. Research your choice of plants before planting. There are well over 700 springtime plants that are a danger to your pet. Even out for your walks you should know which Spring time plants to avoid.
Here are a few:
Azalea- Causes vomiting, diarrhea, drooling, weakness coma
High blood pressure affects the Central Nervous System
Crocus- Excessive drooling, abdominal pain, diarrhea vomiting, loss of appetite
Daffodil- Severe gastrointestinal convulsions, low blood pressure, tremors
Tulip- vomiting, diarrhea, loss of appetite
If you see your dog, eat a plant that you know to be poisonous, induce vomiting. Generally you have an 11/2 hour window depending on the size of your dog to induce vomiting. Any longer you must seek Veterinary help.
For a more detailed list, check out this website.