so we have a greywater system that uses the water from the bath and washer, filters it through 2 feet or so of spearmint and comfrey, and ends up on a garden bed which we plan to grow tomatoes in this year. everything is totally non-toxic/greywater safe, EXCEPT my shampoo and conditioner, which i do have to use. so how bad are they? what ingredients should i avoid? even so-called organic stuff has ingredients that i don't know what they are, and dr. bronners doesn't work on my hair. or is all shampoo and conditioner safe for the garden, because the cosmetics industry cares so much about health (ha HA)?

(i do know that you are officially not supposed to use greywater on veggies, but there are those lovely cucurbit greywater swales in the manual. i figured that fruiting vegs would be ok, just not root or leaf crops...)