Harvest and press lavender flowers for 1 week. Include the leaves and only harvest thin green stems (no older woody stems). Cut the lavender stems to sit 1" below the top of the jar.
Use the kitchen scale to weigh your wax. Weigh your lavender essential oil and set it aside.
Melt your wax over a double boiler. Did the pressed lavender in the wax and work quickly to press it against the side of the jar. Use a craft paintbrush to help hold it in place and paint additional wax over the flowers. Ensure each stem is pressed firmly against the side of the jar.
Once dry, attach your wick to the bottom of the jar with glue or wax adhesive. Use a chopstick or clothespin to hold it up.
Add the essential oils. Refer to your wax instructions to see what temperature to add the oils (typically around 160°F). Mix well.
Pour the wax into the jars. Wrap a towel around the candles and let it sit undisturbed to cool. When set, trim the wicks to 1/4" above the wax.