Comfrey can be used to make a great fertiliser, as it is high in just about every nutrient a plant needs, including nitrogen, phosphorous and potassium, as well as many trace elements.
Its high carbon-to-nitrogen ratio means it does not deplete nitrogen from the soil as it decomposes. In fact, it becomes a good source of nitrogen. And it has more potassium than composted manure.
It is easy to make a comfrey fertiliser, but do be warned: it stinks, so make sure you store it in something with a good lid.
Get yourself a large plastic bin – a standard rubbish bin is ideal. Gather as many comfrey leaves as you can and layer them in the bin. Fill to the top with water, put the lid on and place in a warm place for a few months.
The resulting liquid is great for your plants, but it is strong. Simply dilute it – one part liquid to three parts water – and then spray it on.
TIP: If you’re a bit lazy, tear up comfrey leaves and use them as a mulch around your plants, or add them to your compost bin to start the decomposition process and add wonderful nutrients. Throw the whole plant in, even the stalks.
Or next time you are planting a tree or plant, line the bottom of the hole with comfrey leaves. They will decompose and act as a slow-release fertiliser.
