Here are 20 invasive trees to keep an eye out for.

Native Area: Eastern AsiaUSDA Zones: 3 through 4Height: 30 to 45 feet tallExposure: Full sun

Native Area: Southeastern United StatesUSDA Zones: 3 through 9Height: 30 to 70 feet tallExposure: Full sun to part shade

Native Area: Tasmania and southeastern AustraliaUSDA Zones: 7 through 10Height: 150 to 180 feet tallExposure: Full sun to part shade

Native Area: Central and North AmericaUSDA Zones: 3 through 8Height: 35 to 50 feet tallExposure: Full sun to part shade

If you have ever seen pink peppercorns at a restaurant or store, they were harvested from this tree or its sibling, the Peruvian pepper (Schinus molle). This plant is considered a noxious weed in Florida. Familiar relatives include poison ivy, sumacs, mangoes, pistachios, and cashews.​

Native Area: South AmericaUSDA Zones: 9 through 11Height: 20 to 30 feet tallExposure: Full sun

Native Area: Asia and AustraliaUSDA Zones: 7 through 10Height: 18 to 60 feet tallExposure: Full sun to part shade

Native Area: China and JapanUSDA Zones: 8 through 10Height: 30 to 40 feet tallExposure: Full sun

Native Area: Africa, Asia, and EuropeUSDA Zones: 3 through 7Height: 18 to 25 feet tallExposure: Full sun to part shade

Native Area: Asia and AustraliaUSDA Zones: 9 through 11Height: Can be up to 175 feet tallExposure: Full sun

Native Area: Europe, Asia, and AfricaUSDA Zones: 3 through 7Height: 10 to 20 feet tallExposure: Full sun to part shade

Native Area: Papua New Guinea, Australia, and New CaledoniaUSDA Zones: 9 through 11Height: Usually 25 to 40 feet tall, but can be 100 feetExposure: Full sun

Native Area: Western Asia and EuropeUSDA Zones: 3 through 7Height: 40 to 50 feet tallExposure: Full sun to part shade

Native Area: AsiaUSDA Zones: 6 through 11Height: 40 to 50 feet tallExposure: Full sun

Native Area: South AmericaUSDA Zones: 9 through 11Height: 25 to 50 feet tallExposure: Full sun

Native Area: North AmericaUSDA Zones: 1 through 6Height: 40 to 50 feet tallExposure: Full sun

Native Area: AsiaUSDA Zones: 2 through 7Height: 12 to 15 feet tallExposure: Full sun

Native Area: AsiaUSDA Zones: 4 through 9Height: 50 to 70 feet tallExposure: Full sun to part shade

Native Area: Africa, Asia, and EuropeUSDA Zones: Depends on speciesHeight: Depends on speciesExposure: Full sun

Native Area: China and TaiwanUSDA Zones: 4 through 8Height: 40 to 80 feet tallExposure: Full sun to part shade

Native Area: Europe and AsiaUSDA Zones: 4 through 8Height: 50 to 70 feet tallExposure: Full sun