Comfrey juice is a valuable FREE fertiliser. It is easy to make, just follow the instructions below.
To make a simple press use a length of plastic sewer pipe. The length is unimportant but the longer the pipe the more liquid will be produced; I use about 1.4m (4.5ft.) One end needs to be blanked off with a standard blanking cap. Drill a 6.35mm (0.25 inch) hole (the size of the hole is not critical but it should not be too big) in the centre to allow the liquid to drip through.
The two photographs above show the hole in the end cap and a blanking cap fixed with a nylon screw that is used to cover a mistake!
Fix the pipe to a vertical surface uing clamps. Make sure you can get to the open end and leave a space at the blanked end for a container for the juice.
Next you need a weight that is a snug fit inside the pipe. I used a plastic drinks bottle. It needs to be as heavy as possible so fill with sand and water. Attach some string to the neck of the bottle so it can be easily retrieved from the pipe.Place a container under the blanked end of the pipe to collect the juice. Make sure that rain cannot dilute the liquid in the container by making it a snug fit with the bottom of the pipe.
Now cut some leaves, I generally remove the thicker stems, and fill the pipe.
Comfrey leaves can be an irritant so wear gloves when cutting and handling them.
Push the leaves down the pipe, using a garden cane or similar, to ensure there are no gaps. You can also drop the bottle in a few times. Make sure the pipe is full but with enough room for the bottle at the top. When the pipe is full drop the bottle in the top and wait for the juice to appear – it will take several days. My press produces around 1 litre of liquid per filling.
The juice stinks so don’t spill it on your clothes! You might want to site the press away from the house and not next to your neighbour’s barbeque!
To use the juice dilute 1:10 with water for heavy feeders like tomatoes and 1:20 for anything else.
Want to make larger quantities? Click here for details of how to make Comfrey juice in a barrel.
Updated 27May 2019