A variety of flowering plants provide high levels of toxicity to dogs. If your dog chews on or digs up plants that may poison it, consider avoiding these plants in your garden. Another way to discourage a dog from ingesting toxic plants involves the use of fencing or placing a layer of sharp rocks around the plants. If your dog eats a toxic plant and shows signs of trouble, take it to a veterinarian immediately.
Daffodils bloom in early spring, making them one of the first plants to add color to the garden. The plants grow from bulbs planted in the fall in sunny, well-drained areas of the garden. To reduce the chances of a dog eating the plants, cut the foliage back once it turns yellowish-brown after blooming. All parts of the plants are poisonous to dogs, with the bulb offering the highest toxicity. Deer, squirrels and other animals also find the plant toxic and untasty. When a dog eats small amounts of daffodils, vomiting and diarrhea may occur. Convulsions, low blood pressure and tremors also occur when larger amounts of the plant are eaten.
A wildflower that thrives in moist meadows and along the edges of the woods as well as in gardens, monkshood produces blue or white flowers in late spring or early summer. The plant looks similar to larkspur, growing up to 36 inches in height. Monkshood grows in full sun, but prefers partial shade. All parts of the plant, including the flowers, are toxic to dogs. Dogs show signs of abdominal pain, weakness and respiratory problems after they consume less than an ounce.
The gorgeous, large flowers of the dahlia make it highly desirable in late summer gardens, but dogs find all parts of the plant poisonous. Dahlias come in hundreds of varieties, ranging from 12 to 72 inches in height. The plants produce blossoms from 2 to 12 inches in width in shades of red, pink, yellow, orange and purple. Dogs show signs of gastrointestinal discomfort and mild dermatitis after eating any part of the dahlia plant.
Azaleas bloom in late winter and early spring with more than 250 different species of plants available. The small bushes produce masses of beautiful blossoms in colors ranging from white and pink to red and purple. Some azaleas remain evergreen, meaning they may remain a threat to your dog year-round. Unfortunately, dogs find the plants highly toxic, with vomiting, diarrhea, hypersalivation and weakness offering the first signs that a few leaves from an azalea plant may be the cause.
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