Big-Bract Verbena is a plant species primarily native to parts of North America. It has expanded its presence as an introduced species across significant areas of Europe and the northern temperate regions. This plant has successfully adapted to various climates outside its native range, yet it does not typically reflect a cultivated status as the input concerning cultivation was omitted.

Big-Bract Verbena originates from the temperate regions of North America. As a weed, it is highly invasive and detrimental to gardens due to its aggressive growth habit. It has the ability to blanket entire landscapes, thereby outcompeting desirable garden plants for water, light, and nutrients, potentially causing them to die off. Furthermore, big-Bract Verbena is highly resilient and can thrive in a variety of soil types and climatic conditions. These traits, coupled with its robust reproduction capabilities, allow it to spread exponentially. When left uncontrolled, big-Bract Verbena can transform a healthy garden into an imbalanced ecosystem. The plant's seeds, which are its primary means of dispersal, spread with the help of wind or are transported by animals. These seeds can lay dormant in the soil for extended periods, making complete elimination challenging.

The ideal time for the removal of big-Bract Verbena is during late winter and early spring, before its seeds begin to germinate. The plant should be removed before it reaches the flowering stage to prevent seed dispersal.