Don’t plant a problem in your garden: What to know about invasive plants in California May 18, 2023 Home Explore The Naturalist's Journal Don’t plant a problem in your garden: What to know about invasive plants in California Share FacebookTwitterEmail Over 60% of all invasive plants in California were intentionally introduced for use as a landscape plant, a fish aquarium plant, medicinal plant or for livestock feed. Some of the worst invasive trees were purposely introduced.