Only Bay Area native plants are used in the landscaping, living roof, and constructed wetland at the EcoCenter.  A native plant is one found in our area prior to the European settlement.  Because native plants have evolved in a particular region over thousands to millions of years, they have adapted to the local climate, geography, and living things found there. California native plants require less water and no fertilizer since they are adapted to the soils, temperature, and other climate conditions.  The use of natives in landscaping can also provide needed food and habitat to local animals and other species. Those plants that are perennials (long lived) have deeper root systems that help reduce erosion and can out-compete invasive plant species such as the annual grasses pervasive in the City.