Comfrey

Yes it does smell as bad as they say, but for feeding tomatoe plants you can just chop it up very small and lay it around the plants then water. The goodness from the leaves will gradually leach out. As for seed I would not bother just ask some one for a root as once planted you will soon have a crop of comfrey.

This is a fabulous way of making a liquid comfrey fertilizer.

You'll need a plastic container (minimum size of five gallons) with a tap at the base (old beer-making barrels are perfect for this).

Pack freshly cut leaves into the container until it is really full and then leave it for ten days. Black liquid can then be drawn off. Keep drawing off the liquid into a bottle for several weeks.

After that, the old leaves can be placed on the compost heap and you can keep the concentrate in a bottle in a cool dark place.

Dilute using one part concentrate to fifteen parts of water and use to water around your plants, or as a spray-on leaf feed.

This stuff works like magic!

I made comfrey tea for the first time this year, I just cut the comfrey and put it in a tub with a lid for about a month, The smell is like nothing I'd ever smelt before kinda evil and putrid smelling stuff but an amazing feed for your plants. I've also been told next year to lay comfrey in my potato beds before i plant them.
My main advice would be don't forget to dilute the evil smelling stuff about 15 to 1 I think before feeding your plants.
As for seeds I haven't a clue where to get them, I was told where there was some growing in our allotment site and told to take a couple of smaller plants and honestly I dug them, replanted them on my plot and then cut them right back to make the comfrey tea, and now 3 months later i have my own little comfrey patch it grew back heathier and even flowered.
I'm sure if you take a wander around the more overgrown patches on your site you will find some and as long as you don't take it all I'm sure no-one will mind you helping yourself.
Don't know if I make sense but I hope that helps lol

Just remembered that you can use nettles in exactly the same way as comfrey if you can't find comfrey, You make nettle tea exactly the same as comfrey tea just put your nettles in an airtight container with a lid add some water and leave for a few weeks, you can keep checking it and adding more water to the mix then just drain it off and remember to dilute before you feed your plants. The great thing about nettle tea is nettles are everywhere and they are free and also your allotment site will look better because you are removing them from paths etc,
Hope this helps

Hi Pat21
Sorry I'm late with the reply to your question. When you get your comfrey growing make sure you do not let it flower, there are different types Go to Google click on comfrey and you will find all you need to know If you keep it weed free and some old manure spread over it in winter you should get at least four cuts per year
You can easily make a comfrey pipe. All you need is a piece of plastic pipe that a lemonade bottle will just slide into sand to fill the bottle a cheap funnel available from Wilcos and a milk bottle to catch your liquid gold in Fasten the pipe upright on the side of your shed with the funnel underneath and the empty bottle underneath.fill the pipe with chopped up comfrey place the bottle of sand on top and wait for the magic to take place Comfrey is high potash Nettles done in the same way gives you high nitrogen