cumfrey feed

I have made a fair bit of comfrey but have not used it as a feed as i am not sure on the dilution rate, after all the work of growing i don't want to kill everything

Depends how you made the comfrey tea, either soaked in water or no water & pressed until the juice drips out- the latter is 15-1 if my memory serves me correct, I tend to do 1/2 pint into a full watering can (10ltr) for my tomatoes. The no water extraction method is my preferred routs as it’s less stinky.
Garden organic is where I originally learnt to make it & probably still has info on it
Here’s a link
https://www.gardenorganic.org.uk/expert-advice/garden-management/soil/comfrey