Many common plants can make your dog or cat ill or even kill them.
Here's a list of plants to avoid or to keep out of reach of your pet (perhaps in a restricted area which isn't accessable to your pet). To be on the safe side, I'd avoid them altogether:
Black cherry
Anemone
Poinsettas
Bird of Paradise,
Yew
Solandra
Castor beans
wisteria
mistletoe
jimson weed
Bleeding heart

Cats and dogs often are drawn to the sweet taste of some antifreezes. Keep them from licking up puddles on your garage floor and try to clean up spills immediately.

Chocoate can be deadly to dogs. They don't metabolize it like people do.

Alcohol can also be deadly. Some cats and dogs won't go near it. Others will gladly lap up a sweet drink. Depending on your pet's size, this can make them dizzy, prone to falls and, at worst, be lethal,

Finally, BE AWARE THAT SOME PACKING PEANUTS DISSOLVE WITH WATER. If your pet takes a nip of these peanuts, they can dissolve and be injested. Not a good thing.

So ,there you have it. Some information to keep your pet from getting poisoned by some common household items, plants or foods.