There are so many uses for essential oils, especially lavender. But one must shop carefully because every lavender oil on the market is not essential oil. Some contain artificial fragrances and those are not good. Essential oils are not very cheap, so the price is usually a good indicator of whether it's real or not.
I would actually like to grow lavandula officinalis in my garden. I will have to figure out if we have the right climate here first and then look for a plant or seeds. I bet they would make the garden smell and look beautiful. I'm such a big fan of lavender.