Stuff the petals into the mason jar. Press the petals into the jar leaving as little space as possible in the jar. Then pour the witch hazel over the petals and seal the jar.Carefully shake the jar so that the petals are all covered with the witch hazel. Then place the jar in a cool dark location such as a cupboard or closet. Remember to check on the jar every other day and to give it a shake.
Two weeks after you sealed the jar, you can remove the jar from the storage location.Place a clean strainer over a clean jar or bowl and pour the mixture with the rose petals over the strainer so that the liquid can run through the strainer. The petals that are left in the strainer can be discarded while the liquid can be transferred to a clean jar or container for use.