Take 25 non-chemically treated/organically grown Calendula blossoms
Pick the petals off (no need to wash) & stuff the petals in a jar
Cover the petals with oil of choice. I used olive oil.
Wait 1-2 weeks shaking periodically.
So simple, so organic, so local!
Medical treatment info found at: http://www.webmd.com/vitamins-supplements/ingredientmono-235-calendula.aspx?activeingredientid=235&activeingredientname=calendula