Have a bottle of wine that's gone bad? Some people believe you can use it as a fertilizer for plants, since vino is made from fermented organic ingredients. But hold off on giving your ferns a glass: Wine still has alcohol in it, which is a known herbicide that can dry out a plant. On top of that, if the wine has spoiled and started to turn into vinegar, that is also an herbicide. Instead, pour old wine on top of your compost pile, where it will have a chance to decompose and turn your table scraps and garden waste into beneficial mulch.