As well as needing protection from insects and diseases, plants need nutrients, too, particularly if they grow in pots or hanging baskets. Making your own organic fertiliser from comfrey is as simple as making sprays – and very satisfying.
Comfrey is easy to grow, though it is best in a container, as it is rather vigorous.
1. Harvest leaves from the base of the comfrey plant and remove stems.
2. Chop the foliage and pack tightly into a container with a lid, as the solution can smell as the leaves break down.
3. Use a brick to weigh down the leaves.
4. After a few weeks, top up with fresh leaves and collect the liquid, storing it in a cool, dark place.
5. Dilute the liquid, one part comfrey to 10 parts water.
6. Water with a rose head for a potassium-rich liquid fertiliser to encourage flowers and fruit to set.
7. Add ash to the water to boost nutrients for greedy plants such as broad and runner beans, courgettes, cucumbers and squash.
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