I’m fixing my own vinegar now
There is one with cherry blossom*s, one with violets* – both for cosmetics and one with stinging nettles, birch leaves and ivy as a hair rinse.
All you need is vinegar (I luckily have a never ending ressource of apple vinegar from my grandma) and whatever herbs and flowers you want to mix it with.
Take a clean jar (best sterilize it by cooking it first). Fill up with green stuff of your choice and fill up with vinegar. Then let it rest for several weeks on a light and warm place (no direct sunlight tough) – turn the jar occasionally and when it screams “ready” at you pour it into a sterilized jar of your choice. Can’t wait for them to be done.