Greenleaf Reed Diffuser Oil 8.5 Oz.- Rhubarb & Oak will add fragrance to any room with any reed diffuser. The reed diffuser oil will infuse the air and provide a lasting, constant and beautiful scent. This oil is for reed diffusers, not Greenleaf Aroma Decor diffusers. This timeless scent of natural woods is made modern with a hint of rhubarb and citrus zest rounded out by musk and amber.