Most of the plants used in gardens and landscaping do not invade or harm wildland areas. But a few vigorous species can - and do - escape from cultivation into open landscapes and cause a variety of ecological problems. They crowd out native plants, insects and animals, and can lead to increased flooding, fire and crop losses.
A few simple steps can prevent invasions before they start. We can be an environmentally responsible community - one that supports horticultural businesses and beautiful gardens!
If you already know which California region you are in, you can go directly to your regional list:
- Sierra & Coastal Mountains (Sunset Zones 1-3)
- Central Valley (Sunset Zones 7-9)
- Desert (Sunset Zones 10-13)
- North & Central Coast (Sunset Zones 14-17)
- South Coast (Sunset Zones 18-24)



