Is it possible to use ocean water for crops?

Agriculture uses the most water in California. Would it be possible to build distilling plants that take the salt out of salt water so california can use it for things like crops, lawns, car washes, etc.? I know fresh water from the colorado river and resevoirs have minerals but Im sure we can add some to distilled salt water. Laying down pipes and channels to get water to crops and cities is possible because thats how water from the Colorado river gets to California cities like LA and San Diego. Building distilling plants (not green plants that grow from the ground; the other plants, kinda like factories) would make more jobs. I know money isnt an issue for the government to build these because they spend billions on war and war technology. what do you think?