Fill your container about ½ to ¾ full with comfrey. If using fresh leaves, crush, tear or bruise the leaves and pack them in your container tightly.
Add water to the container, filling it up.
Add the lid and secure it tightly.
Place outside and leave it for at least 6 weeks. If in a cooler climate, you may want to leave it up to 12 weeks, as the warmer it is the quicker the brewing process.
Strain out the leaves if you want, and it is ready to use. The leaves could be added to the compost.
To use, you will need to dilute the strong comfrey fertiliser with at least equal parts of water. If wanting to use this to feed your plants fortnightly, dilute even more. A good indicator is the colour of the solution. The darker it is, the more it should be diluted.Use as a liquid soil drench or as a foliar spray. When spray on foliage, it can help prevent the spores of powdery mildew from germinating. Even though it has a horrendous smell, it can also attract beneficial insects which can help reduce pest issues.For best results, use on established plants that are just starting to flower and set fruit. If using on seedlings or very young plants, dilute significantly so as not to burn the plants.