Using water from a washer
I tried using the gray water from my washer a number of years ago and I wasn't particularly happy with the result. I called the manufacturer of the detergent I used at the time to ask about using water containing their product, even the rinse water. I was told not to use it, even on ornamentals. No explanation was given, only the admonition not to use it.
It would be better to call about the products you use than lose an expensive plant or contaminate your soil. I should have asked for a complete ingredient list to see what might be the problem but I didn't. I use a different product now but can't easily set up my washer to utilize the gray water anyway.