I'm sitting on the fence with this one myself...
I truly know what she is going thru,
if wanting to save money, with what sounds like a
****we lived on a hill w/spring
and if it was hot, dry, no rain...we had NO WATER,
we had to conserve.. and made do with what we had****
So, I understand why she maybe asking this question...
And a gardener can put some amount of soap on a plant
(they use a tablespoon in mixtures to adhere the liquid to the leaves when spraying for troubles or foliar feeds)
And I suppose, in bathwater you'd have a certain amount of
dirt *from one's body* which the plant is already in, and gets' sprayed on by splashing water from rain or hose...
And I could assume, WITHOUT BEING 100% SURE, that if there's dead skin cells which would normally come off of
one's body during the bathing process, wouldn't or shouldn't hurt a plant.. maybe also even give it some kind of nutrition??? *something that would decompose and add to the soil??*
And one does normally wash off a item brought in from
the garden, so again, would or should be clean..
And the rain water would or should wash away things too,
if it were bad something in the other water...
but I am not 100% certain really...
I tend to think back to the olden days before hoses'
and town water tanks, etc.. what the folks did for their
water in their gardens...
***I think back to the old expression..
"Don't throw out the baby with the bath water"
~~~>Meaning...the head of the house hold got his bath first, then usually any other adult then the kids, and the baby was last.. and the water was sooooooo muddy/cloudy looking, you might not be able to see the kid when you chuck out the water.. I would sermize *sp* that they also
used the bath water on their plants at the very end..<~~~