How to make comfrey feed
Comfrey plants can be turned into a free organic feed that contains an easily accessible supply of valuable plant nutrients, including the three essentials – nitrogen, phosphorus and potassium. But a word of warning: comfrey is hugely invasive, so grow it in a pot to stop it spreading, or buy ‘Bocking 14’ plants, which are sterile and less likely to take over your garden. To make the feed, simply chop up the leaves and stuff them into a large bucket or watertight container (preferably with a lid, as it gets a bit smelly!). Fill the container with water and leave it for four to six weeks. Dilute the resulting liquid with water until it’s the colour of weak tea, then use it as a liquid feed on all manner of plants. You can also add comfrey leaves to your compost heap (they help to speed up the rotting process) and put them in the bottom of your bean trench to decompose and feed these hungry plants through the summer.
gardenersworld.com Keep comfrey contained in a pot, as it has a tendency to spread vigorously Feed diluted comfrey fertiliser to all your plants to give them an immediate boost