The following 3 herbs can be sown mid-winter to enable a period of stratification.
Sweet woodruff (sow into module trays with compost)
Sweet Cicely (needs several months of cold winter to germinate)
Cowslip (gerninate the seeds in a cold green house for 4-6 weeks)
Sweet woodruff and cowslip produce flowers that can be used in salads while cicely has an edible root and edible leaves.