6. Norway maple

Another native of Europe, the Norway maple, and its numerous cultivars have grown in gardens and parks for many years owing to their lovely fall colors and large leaves. They come in the typical green leaf forms and purple and variegated varieties.

Their appearance aside, Norway maples are some of the worst trees to plant in a yard. They are exceedingly messy trees and produce millions of seeds each year. From these seeds emerge thousands of seedlings, and in certain areas of the US, they have become yet another invasive species, disrupting ecosystems and blocking out native plants.

What to plant instead: If you’re looking for a beautiful maple tree, go with a red maple. Native to North America and able to survive in several environments and soil types, these popular trees come in many varieties that showcase their amazing fall colors.