Compare Black Jack with more feminised cannabis seeds, browse lemon cannabis strains, or read the PrimeStrains genetics journal.
Black Jack is a feminised hybrid from Nirvana, created by crossing the strong Black Domina with Jock Horror. The cross leans towards sativa in character and tends to finish flowering within roughly eight to nine weeks, which suits growers wanting a quicker harvest. Plants stay fairly compact with tight internode spacing, so they can work well in smaller grows, though the sativa-leaning genetics are best suited to experienced growers. Resinous buds build into hefty colas, and the aroma is strong and earthy, with citrus and lemon notes alongside a touch of spice. Stated THC levels sit between 16 and 20 percent, with CBD only around 0.1 to 1 percent. It is pitched at busy people who need to stay sharp, and its focused, energetic character suits daytime hours. Outdoors, the plant keeps a low profile, which can suit discreet gardens, and it is described as holding up well in cool, damp weather.