One thing worth looking into is how to extract lavender oil, assuming your climate can handle growing lavender. It is a good and surprisingly effective topical antiseptic.
Not a replacement for the other antiseptics, but something you can grow that stretches your reserves.
I love lavender essential oil! It is also the best 1st response to a kitchen burn. It is the only essential oil I have found that, when burned as a candle, will eliminate cooking and smoke odors, even heavy onion odor. As a tea, it is calming, and while not as effective as St. John’s Wort, it also seems to not have similar drug interactions. I have noticed more and more cleaning products have lavender fragrance added, FWIW. Likely just synthetic fragrance, but it is as effective for odor removal, IMO.
It will only grow here as an annual. Therefore,the essential oil, candles and good quality tea are a part of my stores. I do have a new greenhouse (cold frame) and so, I have been planning on trying to grow some lavender in pots, just because I like it. But distilling essential oil takes mass quantities and the oil is affordable and keeps well.
I am totally envious of the zones where it can be field grown.