Some experimenting.
I let a tablespoon of cinnamon soak in 3 tablespoons of 85% rubbing alcohol for several days. This was mostly ethanol but also had a small amount of isopropyl alcohol in it. I filtered it and added a tablespoon of this mixture to a liter of water, added a teaspoon of baking soda and 1/2 teaspoon of dish washing liquid(to help the spray wet the waxy foliage better) and 1/2 teaspoon of liquid soap.
I sprayed this solution on Maui Moonlight, Ask Alma, Seraphita, 3 smaller rhizomes of Dangerous Mood and 3 rhizomes of Red zinger(near my boiler room entrance). I also tried this on the lily Robina and my most easterly plantings of the lily Whistler. I will be checking these for any bad reactions before proceeding any further.
My hope is then that this will be somewhat preventive to leaf spot on irises and Botrytis cinerea on lilies and also of course work preventative against bacterial soft rot. Baking soda has some effect on Botrytis cinerea on lilies and is supposed to help with leaf spot on irises, but I'm uncertain of what dose to use for irises. More baking soda should have better effect, but can also burn leaves.
To mix cinnamon and baking soda together is rather experimental and I do not know what the effect will be, so nothing I recommend, just want to inform anyone interested that I'm testing it.
