Comfrey, comfrey (Symphytum x uplandicum). This valued medicinal plant, also called healing comfrey, is a natural hybrid of rough comfrey (Salvia harsh;) and comfrey (Symphytum officinale). The comfrey is a perennial plant, wild in wet forests, in the meadows and plains of central Europe. Comfrey should not be missing in our herb garden. Due to the content of valuable substances in the leaves, m. in. alkaloids, it is used to make drugs. The gardener is interested in the direct effect of the liquid manure and comfrey extract. Who has watered their houseplants with such a solution at least once, he will surely start growing comfrey. It produces a lot of leaves, and also activates the potassium reserves in the soil. You can use both of its roots, and leaves. We harvest the roots in April, just before flowering plants, then they contain the most valuable ingredients. On the other hand, we can cut the leaves constantly, all summer long, until the first autumn frosts. It is worth drying the leaves collected in autumn and keeping them for the winter. Prepare the comfrey slurry similar to the nettle. On 10 kg of fresh weight of leaves
need 100 1 rainwater; in April, some roots can also be added to the extract. After a few days, the solution is diluted 3-5 times and the plants are watered with it to stimulate their growth. In winter, however, dry leaves or roots are poured over with hot water and left in a warm room for a few days. The prepared liquid can be used to water houseplants. Comfrey contains many valuable ingredients, especially potassium, which should justify its wider use in the garden.