I have always cut the Comfrey down and put it into large barrels with water,it only takes a couple of weeks to make the "Comfrey Tea" especially if it is hot weather,my barrels are covered with lids,after a couple of weeks you can smell it,it is really very pungent~so must be ready
I have used this on everything this year with great success,my largest tomato crop ever,still going strong,the Pattypan squash love it,though I am not too sure about the chillies.?!But they are going well at the moment.