I seem to recall that you also in the past suggested using milk that had gone bad.
The plants don’t care and at least it isn’t wasted.
Whenever we’re at the end of a gallon jug of milk (which is weekly!) I fill it up with water and use it to water my indoor Geraniums and pretty much anything else on hand that flowers. Works like a charm and things look good all winter.
Beau teases me. I always keep a pan of water on the porch for any passing dog that needs a drink. It gets gross by mid-day, so I pour leftovers onto my garden pots around the porch or on the Clematis or Hosta, etc. He says I should patent that and market it as ‘Dog Spit Water’ since my plants always look so nice, LOL!