Begin by placing your dried lavender into a heat-proof glass jar. Pour the olive oil over the lavender, making sure the herbs are fully submerged. Set the jar in the center of a medium saucepan filled halfway with water, creating a makeshift double boiler. Heat on low-medium and allow the lavender to infuse into the oil for 3-5 hours. The slow, gentle heat draws out all of the beneficial properties of the lavender without compromising them.
Once the oil has finished infusing, remove the jar from the heat and allow it to cool slightly. Place your cheesecloth or fine mesh strainer over a clean bowl and carefully pour the oil through to separate the lavender from the infused oil. Strain 2-3 times to ensure all plant material has been removed, leaving you with a clean, fragrant lavender oil.
Place your strained lavender-infused oil and beeswax together in a double boiler or heat-safe bowl set over a pot of gently simmering water. Heat on low, stirring regularly, until the beeswax has fully melted and combined with the oil into a smooth, even mixture.
Once the mixture has melted and is fully combined, remove it from the heat. If you are using lavender essential oil, add a few drops now and stir gently to incorporate. This is the moment to work quickly, as the mixture will begin to set as it cools.
Carefully pour the warm salve mixture into your tins or glass jars. Work slowly and steadily to avoid spills. Once poured, leave the containers undisturbed at room temperature to cool and solidify. While the salve may appear solid within an hour, allow it to cure for a full 24 hours to ensure it has completely set before sealing and storing.
Once fully set, seal your tins or jars and store them in a cool, dry place. Your lavender salve is now ready to use whenever you need a moment of calm. Massage a small amount into the pressure points on your wrists and behind your ears for stress relief, or smooth it onto dry skin as a soothing, nourishing balm.