I put a bucket in my kitchen sink and use it to rinse off dirt from potatoes and I also put in water I've used for cooking when I boil pasta or steam vegies. I also put in the coffee grounds from our coffee plunger.

I put all this into my garden and it's never looked better.

I shudder to think how much wonderful topsoil and nutrients are put down our sinks every day.

I don't use the greywater from my washing up in my garden as I've heard it's not suitable because of all the fats.