Blueberry Muffin by Humboldt Seed Company is a feminized, indica-dominant cultivar created through an F9 stabilization process from the cross of Purple Panty Dropper and Razzleberry. This variety is celebrated for its robust structure, ease of cultivation, and signature bakery-sweet terpene profile. It expresses consistent phenotypic stability with vigorous growth, dense resinous buds, and strong adaptability in both soil and hydroponic environments. Blueberry Muffin’s flowering phase lasts approximately 45 days indoors, while outdoor plants typically finish between September 15th and October 10th. Under optimal conditions, plants reach 60–80 cm in height and develop a compact, stocky form with broad leaves and thick branches capable of supporting heavy floral clusters. Cooler nighttime temperatures may induce striking purple hues, adding ornamental appeal. The cultivar’s terpene profile blends blueberry, brown sugar, and baked muffin notes with subtle chamomile and herbal undertones, creating a complex sensory experience. THC levels range between 20–28%, providing a powerful yet balanced high that begins with an energizing uplift before transitioning into a deep, tranquil body relaxation. Blueberry Muffin is favored by both novice and commercial growers for its predictable yields, medium-high production capacity, and strong resilience under varied conditions. Germination typically occurs within 2–10 days, with the cultivar responding well to standard indoor photoperiod cycles and outdoor climates where late September harvests are possible. This variety’s combination of visual beauty, dessert-like aroma, and balanced effects has earned it recognition at events such as the Emerald Cannabis Cup, solidifying its reputation as one of Humboldt’s flagship modern classics.