Wisteria flowers -- blue, violet, or white spring blossoms with a strong, fresh fragrance -- are commonly found in essential oils and perfumes. The flower's scent is believed to create a romantic atmosphere. Commercial essential oils are quite expensive and may contain undesired chemicals. You can make your own essential oil with dried wisteria blossoms and grape oil.
Cut off wisteria branches with flowers in spring, when the plant is in full bloom.
Hang the branches upside down with string in a dark, dry, cool area such as a closet. Let the branches hang until the flowers are completely dried out, which can take two weeks to a month.
Pick off the dried flowers, and crush them in a mortar and pestle. Fill a dark glass jar with the crushed flowers.
Cover the flowers with grape seed oil, a light, low-fragrance natural oil.
Cover the jar, and let it sit in a dark area for at least two weeks to allow the scent to develop.
Strain the mixture through a piece of cheesecloth into another dark glass jar to remove the solid flower pieces. Store the essential oil in the dark glass with a lid. Clear glass lets in light, which can deteriorate the oil.