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What kind of plants can I irrigate with graywater? 

Graywater is better for certain plants compared to others: Decorative trees, fruit trees, shrubs, vines, California-native riparian plants and hardier native plants perform well. Very advanced and expensive subsurface drip systems can irrigate lawns with graywater when properly permitted and designed. Keep it simple before considering more advanced options.

Never use graywater to irrigate fruits or vegetables that come in direct contact with graywater or the soil surface, such as root vegetables like potatoes or carrots.