This will make sure that there are no oils from your skin on the plants you are using for the remedy. The plants for flower essences must also be picked at exactly the proper time of day. No, this isn't as much of a pain in the behind as it sounds like. Simply scout out your area that you are going to pick your plant from the day before you plan to do it. For sun remedy plants, you want to pick them on a sunny day with no clouds.
Any bright day is good for boiling remedy plants.
Put the flowers in the bowl of water, covering the entire surface. Use a twig to arrange them, not your fingers. You want to place this bowl directly in the sunlight for 3 hours. Then remove the flowers with a twig and filter the liquid. This mother tincture will prepare many bottles of tincture over the years.