The Rhubarb Rhubarb! Reed Diffuser Refill, an invigorating way to keep the dewy wake-up scent of a Yorkshire Spring in your home. Inspired by the fresh, bittersweet fragrance of crushed Tarragon and muddled Rosemary, this refill boasts the same bright and complex aroma as the Rhubarb Rhubarb! Reed Diffuser.