As aromatherapists, when we reach for a bottle of Douglas-fir (Pseudotsuga menziesii), how often do we consider the origin of its name? Do we know where it is natively grown? Do we know how to identify it if we see it? Do we know its history of use? Do we understand what went into obtaining the essential oil and how the weather and season affects the yield? Do we know what to expect in terms of aroma from a quality Douglas-fir? Do we consider the chemistry and the potential therapeutics before blending? This article delves into these ideas and more.