Cultivation
The yellow-flowering form is widely grown as an ornamental plant for its attractive yellow flowers and also to bind drifting sand dunes. It has however escaped from cultivation to become an invasive species in many areas. Outside of its native range in North America, it is somewhat invasive both in southern California, and further north to southwestern Canada. It has also been introduced in western Europe, Australia (where it is considered a potential noxious weed), New Zealand, Anatolia Aegean Region of Turkey and southern South America, including the Falkland Islands.
Like many members of the family Fabaceae, it is an effective fixer of nitrogen in the soil. Where it has been introduced, it changes the chemistry of the soil, and therefore allows other exotics to establish themselves, to the detriment of native vegetation adapted to low nitrogen levels. It also hybridizes with other lupine species such as Lupinus littoralis (seashore lupin) and Lupinus rivularis (riverbank lupin), further endangering the survival of those forms.
Read more about this topic: Lupinus Arboreus
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