There’s no need to face the coming winter in the glum expectancy of no fresh herbs being available. While there is still greenery visible above ground, dig up sufficient growth to keep in a pot on a windowsill or in a glasshouse or frame. This works for the herbaceous types, such as mint, chives and marjoram. You need a section of plant, root and all, a handful of compost per plant and a pot. Keep them in a bright spot, but not too warm or they will sicken.