Used to promote rooting.
just

supposed to work as good as rootone,

Ok I’d like to know how to make willow water?

So itw pretty well known willow grow roots quickly i remember my aunt sticking weeping willow shoots in dirt 60+ years ago there's huge trees there now
Are you saying willows have a chemical that helps other plants form roots???

Aloe works real good for a root tone.

Here we cut willow and stick them in the mud for goose blinds. Often the next year the blind is living and growing.

Willow bark is a natural pain killer. Natures aspirin.

Yup that's the stuff.
Googeling willow water gives some videos. It will send you to UTUBE. The videos say 1" long and the size of a pencil. There is one video that includes the leaves. I've heard discard the leaves. I'm thinking that crushing the pieces would be helpful but haven't tried it. I will "plant" some cuttings from our hedge today.We'll see what happens.
good luck

just

Seems like a 20% increase in roots is pretty minimal?

True but if you have a 30% success rate to start with your now up to 50%

All I want is something that kills willow forever !!

Forest fire?