Heat plant oil slightly and then add chamomile, nettle leaves and birch leaves. Leave to brew for approximately 30 minutes. Strain mixture. Add one egg yolk, honey, lemon, and rosemary oil. Mix well.
Apply mixture to damp hair and massage gently until hair is completely coated. Cover hair with a towel, shower cap or cling wrap. This will retain heat and enhance the nourishing effects of the treatment. Leave on for 30 minutes and rinse out with cool water.