Quick Answer
To extract oils from yarrow for medicinal uses, harvest the flowers and leaves early in the morning after the dew has dried, then dry them thoroughly. Use a solvent like ethanol or hexane in a ratio of 1:1 to 1:5 with the plant material to create an essential oil. Filter the mixture before distillation.
Harvesting and Drying Yarrow
Harvest yarrow flowers and leaves in the early morning after the dew has dried for maximum oil quality. Cut the stems about 1-2 inches above the node to prevent water from entering the plant and spoiling the material. Dry the yarrow thoroughly, either air-drying it in a warm, dry place or by using a dehydrator at 95°F to 105°F (35°C to 40°C).
Extraction and Distillation
To extract the oils from yarrow, combine 1 part plant material with 1 to 5 parts of a solvent like ethanol or hexane in a clean glass container. Stir the mixture well and let it sit at room temperature for 2-3 hours to allow the solvents to penetrate the plant material. Strain the mixture through a cheesecloth or coffee filter to separate the plant material from the solvent.
Essential Oil Distillation
Transfer the solvent mixture to a distillation apparatus or a double boiler. Distill the mixture slowly at a temperature between 180°F to 200°F (82°C to 93°C) to create an essential oil. Monitor the temperature closely to prevent overheating, which can damage the oil’s volatile compounds. Collect the essential oil and store it in a dark glass bottle with a tight-fitting lid.
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