How Kudzu Conquered the South: From Expo Ornament to Invasive Menace

Kudzu (Pueraria montana) arrived in the U.S. at the 1876 Philadelphia Centennial Exposition as a Japanese ornamental vine. Its fragrant flowers and rapid growth charmed gardeners.

In the 1930s–40s, the Soil Conservation Service promoted it as a miracle cure for erosion on depleted Southern farmland. The Civilian Conservation Corps planted millions of acres. Farmers were paid $8/acre to sow it. By the 1950s, kudzu had escaped cultivation, smothering forests, fields, and structures across the Southeast.

Today, it covers an estimated 7+ million acres, growing up to 1 foot per day in summer. It kills trees by blocking sunlight, alters soil nitrogen, and costs hundreds of millions annually in control efforts. A cautionary tale of good intentions, poor ecology, and the law of unintended consequences.