Methods for making lavender oil include cold and heat infusion, says the Herbal Academy of New England. Cold infusion recipes use natural warmth to slowly release the aroma and other properties of dried lavender into carrier oil. Heat infusion recipes use a stove or oven to accelerate the process.
To make lavender oil using the cold infusion method, fill a clean glass jar with dried lavender. Cover the lavender with a carrier oil such as olive, almond or grapeseed oil, recommends the Herbal Academy of New England. Close the jar with a tight fitting lid, and place it in a sunny or consistently warm place. Stir the jar contents daily for the first two weeks, and leave it to infuse undisturbed for another two to four weeks, says Whispering Earth. Strain the oil through cheesecloth, and store it in a colored glass bottle. For the heat infusion method, use about 1 cup of oil for every 1/2 cup of dried lavender, says Black Thumb Gardener. Simmer the oil in a crock pot or in a double boiler on low heat for about three hours. Allow the oil to cool completely before straining it.