In addition to pharmacological agents in the treatment of hypertension, it has been reported in studies that aromatherapy applications, one of the traditional and complementary alternative treatments that are easy to apply nursing interventions with minimal side effects, have an effect on high blood pressure control. Studies have shown that aromatherapy has positive effects on stress management and anxiety control. Lavender oil, one of the frequently used aromatic oils, has antiseptic, anti-inflammatory, analgesic, muscle relaxant effects, regulates sleep with its relaxing and sedative effects, reduces the severity of itching, increases attention and facilitates learning, and reduces physical indicators of the autonomic nervous system such as pulse, respiratory rate and blood pressure. It has been shown in studies that it lowers In this study, the effect of lavender aromatic oil on sleep, anxiety and vital signs in individuals with essential hypertension will be evaluated. In the study, lavender oil will be administered to patients by inhalation for 5 minutes twice a day for 4 weeks. Medicinal lavender oil will be applied to the intervention group, and sesame oil will be applied to the placebo group. During the follow-up of the patients, the patient follow-up chart-researcher form will be evaluated at the beginning of the first week and at the end of the fourth week for each group. Vital signs, blood pressure and pulse rate, half an hour before and after aromatherapy in the morning and evening, 5 days a week for four weeks, will be evaluated with the Pittsburgh Sleep Quality Index and State-Trait Anxiety Scale at the beginning of the first week and at the end of the fourth week. The unique value of this study is that, unlike other studies, the applications will be applied in the morning and evening for 4 weeks, and sesame oil, which does not have an aromatic effect, will be used in the placebo group. As an expected patient outcome, we foresee improving the quality of life of patients by improving their sleep quality, reducing their anxiety level, and lowering their blood pressure by taking advantage of the healing effect of lavender aromatic oil in nursing practices.