Nettle tea

I found this http://www.timfloyd.co.uk/nettle_tea.pdf
so i've partially answer my own Q 

I made some yesterday with a mix of comfrey and nettles. I wanted it to really be comfrey tea but have not got enough comfrey leaves yet so topped up with nettles. Filled a black bin bag with the leaves. Stuck a fork into it a few times to puncture. Tied some nylon string round the top to keep it shut and stop it from getting lost in my blue water but (I put a half brick into it to make sure it does not float). It is now festering away and should be ready to use for my spuds and toms in a month or so. I have also filled an old chicken manure tub with the same mix of leaves and water and will keep pouring the liquid from this into the blue bin to top it up.

I'm trying this for the first time using a big empty bird seed tub, also using nettles and comfrey.. Forgot to add the water though, guess I'll be heading back down tomorrow..