Oops, it wasn't daylilies as you said; must have read that somewhere else where someone did that. Of course I'm fixing to be 41 so my memory has been going ever since I turned 40
Anyway, if you google willow water it does the same thing since that is where aspirin originated from, that was talked about over on MyDaylilies.com. Here's an article that explains it
http://www.bluestem.ca/willow-...
So if you have a willow tree you can make willow water and use on your plants also, although dissolving an aspirin is much simpler
I would read various articles on the aspirin water to determine a dosage because as I have read, too much can be toxic just like if you swallowed too many aspirin