What laundry detergent should I use for greywater applications?
...-detergents, even ones marked “biodegradable”, are not appropriate for the soil because they are essentially salt-based (look for the word sodium on the label). They play well with aquatic life, bless them, and they’re a fantastic alternative to more toxic detergents if your laundry water is going to the sewer, but they aren’t good for soil microorganisms. Surely you’ve heard that salting the land is a bad idea? You don’t want to salt your garden....
