Scent diffusers (e.g., air fresheners) having adjustable scent diffusion rates may comprise scent intensity adjustment configurations for adjusting the intensity of a fragrance material emitted from the scent diffusers. In certain embodiments, the scent intensity adjustment configuration may take the form of slidable planar scent panels saturated with fragrance composition that may be moved into and out of a hollow body portion. When positioned substantially within the hollow body portion, the scent panels emit fragrance composition at a first rate, and when positioned substantially outside of the hollow body portion, the scent panels emit fragrance at a second rate, faster than the first rate. Alternatively, a scent diffuser may have a body portion containing a scent panel, wherein the body portion has a plurality of ventilation openings to control the rate of fragrance composition diffusion by rotating an adjustment panel to selectively block the ventilation openings of the body portion.
