Planet Ark has produced a Laundry detergent that's garden friendly.  If you're pouring your laundry grey water water on the garden and are concerned that the high pH might and high phosphates might kil your plants, then check out this detergent from Planet Ark.

Platen Arks detergent has been independently tested by Sydney Environmental and Soil Laboratory for their suitability for use in irrigation (including watering the garden). The grey water was found to be suitable for salt-sensitive plants. and phosphorus-sensitive plants.

Check out the Planet Ark Website.