BX stands for backcross, a breeding term used when a cannabis hybrid is crossed back to one of its parent plants or to a closely related genetic line. Breeders use backcrossing to reinforce specific traits - such as flavour, aroma, potency, structure, resin production, flowering time, or colour - while making the resulting strain more consistent and closer to the chosen parent.

For growers, the BX label offers useful insight into a strain’s breeding history and the traits its seeds are designed to express. A backcrossed variety may be selected to preserve the standout qualities of a famous parent while improving stability, predictability, or overall performance. At Seedsman, the BX category highlights cannabis seeds connected to backcross breeding - ideal for growers interested in lineage, trait expression, and genetics with a more intentional breeding direction.