In Southern California, we are dealing with water restrictions due to years of continuous drought and water shortages. Here is one way to start saving on irrigation water. Our washer is in the garage, so it is easy to run this set up out to the yard. It is working great for me and I am saving a ton of water on irrigating my ornamental plants and trees. I already had the trash can and a 3/4 inch garden hose, so this set up only cost me about $10 plus the cost of another 3/4 inch hose (about $30).
Make sure you only use biodegradable laundry detergent labeled for greywater use. Also, there are a few more rules for using greywater so be sure to read those at the end of this instructable.