Im no rose expert....this is my first year. I am a chef however. It seems to me that if you put baking soda into milk, the lactic acid will react with the soda, and you'll get a little science experiment, eruption. It wont be as drastic as adding it to vinegar, but it will react. As for the benefits, im still searching here!!

ciao,
Anton

I guess I thought milk was more on the alkaline/neutral side. Ok.
Anyone ever try it though?
Or is there another mixture one might try/has tried?

The way that milk, baking soda, and vinegar control blackspot is by lowering or raising the PH of the leaf to a range that the blackspot will not grow within. So if you mix different things and one is a base and the other acidic they are likely to cancel one another out.