I know, I hate to see all that water to down the drain too! I've used
my laundry water for the lawn and shrubs with no problem. I haven't
tried it on veggies.

If you use boi-degradeable SOAP not detergent you can use the wash
water. The rinse water is fine by you have to be careful about that
fabric softener.

Plus, deep watering is better for shrubs than a sprinkling anyway.
Good for you!