What is the world’s largest plant? April 12, 2012 by Pamela Landy · Filed Under: Science The largest plant in the world is said to be the General Sherman Tree, a giant sequoia in Sequoia National Park, California. The tree is about 272 feet tall and more than 100 feet in circumference. It is about 3,500 years old. Related PostsWhat is the most widely cultivated plant?What is the largest rodent in the world?What is the largest bank robbery in the world on record?Is Mount Rushmore the largest sculpture in the world?What are the five largest Lakes in the world?