AusBonsai

Do you have to water it down ? If so what strength.

Cheers

It is a bit hard to advise because worm juice is always different. I just use the stuff that comes out of my worm farm straight on the trees and I have not had any problems with it but mine is probably already pretty dilute. My worms don't get too much to eat because the chooks get first choice.
Other people recycle the worm juice through the worm farm to keep them damp so it gets stronger and stronger. Maybe that would need to be diluted.

Most recommendations are to make it like weak tea?
Half water should be safe enough I think because worm juice is not really very strong to start with.