Common Invasive Plants In Zones 9-11 And How To Avoid Them

By Darcy Larum, Landscape Designer

An invasive plant is a plant that has the ability to spread aggressively and/or out compete with other plants for space, sunlight, water and nutrients. Usually, invasive plants are non-native species that cause damage to natural places or food crops. Each state has their own lists and regulations for invasive species. Continue reading to learn more about invasive plants in zones 9-11.

Invasive Plant Information for Zones 9-11

In the U.S., parts of California, Texas, Hawaii, Florida, Arizona and Nevada are considered zones 9-11. Having the same hardiness and climates, many invasive plants in these states are the same. Some, though, may specifically be a problem in one state but not another. It is always important to check with your local extension service for your state’s invasive species list before planting any non-native plants.

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Below are some of the most common invasive plants in warm climates of the U.S. zones 9-11:

California

Texas

Florida

Kudzu

Hawaii

For more complete lists on zones 9-11 invasive plants, contact your local extension office.

How to Avoid Planting Hot Climate Invasives

If you move from one state to another, never take plants with you without first checking invasive species regulations of your new state. Many plants that grow as tame, well controlled plants in one zone, can grow completely out of control in another zone. For example, where I live, lantana can only grow as an annual; they never grow very big or out of control and cannot survive our winter temperatures. However, in zones 9-11, lantana is an invasive plant. It’s very important to know your local regulations about invasive plants before moving plants from state to state.

To avoid planting hot climate invasives, shop for plants at local nurseries or garden centers. Online nurseries and mail order catalogs can have some beautiful exotic plants, but they could be potentially harmful to natives. Shopping locally also helps promote and support small businesses in your area.

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