This is the major use of aromatic plants and is the one dealt with in this paromatic plantser.
As raw materials for essential oils extraction
These are plants in which their nonleafy parts are used as a flavouring or seasoning.
As spices
These are plants in which their leafy or soft flowering parts are used as a flavouring or seasoning.
As herbs
These are aromatic plants used in some ways other than the ones mentioned above, e.g. as medicines, cosmetics, dyes, air fresheners, disinfectants, botanical pesticides, herbal drinks/teas, pot pourri, insect repellents, etc.