• Caladiums are toxic landscape plants.feuille de caladium image by Unclesam from Fotolia.com
  
  All home gardeners should familiarize themselves with landscape plants that are harmful to young children and pets. Many poisonous landscape plants can be harmful or fatal if they are accidentally eaten or touched. If you suspect a person or animal has eaten a toxic plant, contact your doctor or veterinarian immediately.
  
  

Oleander

• Oleander grows in the spring, summer and fall and is very popular in the southeastern states. The plant blooms red flowers in the summer that are very toxic. If ingested, the plant can cause dizziness, irregular heart beat, nausea and possibly death, according to the University of Georgia's website. All parts of this plant are toxic.
  
  

Yew

• Another very toxic landscape plant that can cause sudden death when ingested is yew. Yew blooms in the spring with a yellow flower. The plant also has berries, but the foliage is more toxic than the berries. Death can be sudden without symptoms.
  
  

Lantana

• Lantana is a landscape plant that has toxic green berries. The berries are poisonous and contain an atropine-like compound called lantodene. Sheep, cattle, horses and humans are commonly poisoned by lantana, according to the University of Arizona's Agriculture website. When ingested, the poisonous berries can cause vomiting, diarrhea and upset stomach. Lantana is native to tropical regions, and flower colors range from white to yellow, orange to red and pink to rose.
  
  

Virginia Creeper

• The Virginia creeper is another landscape plant that has toxic leaves and berries. The plant is common in many eastern states, and the berries are dark blue to black in color. The Virginia creeper is a vine that is often confused with poison ivy. If the leaves or berries are ingested, they can cause bloody vomiting, nausea, kidney damage, headache and abdominal pain.
  
  

Caladiums

• All parts of the caladium plant are toxic. Caladiums have two-colored leaves and are heart-shaped. If any part of the plant is ingested, it can cause burning in the mouth and throat, as well as vomiting.
  
  

Azalea

• All parts of an azalea plant are poisonous. The plant flowers in May and June and is common in northeastern states. The bases of the flowers form a tube, and flower colors can be pink, white or orange. If ingested, the plant can cause difficulty breathing, weakness, dizziness, vomiting, nausea and coma.