Soak the soapwort overnight and then drain ready for use.
Put the herbs into a pan and pour on 2 pints of water.
Bring to boil, coven and keep boiling for 15 minutes, then remove from the heat and leave to infuse for about an hour.
When cool, strain into bottles, seal, and label.
This will keep for about a week in the fridge, but you can make batches of 300mL to freeze in pots or freezer bags.
You'll need about a cup of the shampoo each Time you wash your hair