Blog/Inbreeding depression, said plainly
Genetics · 30 Aug 2026 · 5 min
Inbreeding depression, said plainly
Lock the line too hard and the pack goes quiet. Why we stop a Bx before the vigour drops out.

Inbreeding is mating relatives. In a seed line that is often a backcross or a brother-sister. You concentrate the traits you scored. You also concentrate the junk: slow germ, thin stems, herms under a heat spike, a nose that used to be loud.
Depression is the name for when the junk wins. It is not a mood. It is fewer seeds that pop, plants that stall, a jar that smells like the room instead of the parent. Bx2 on Durban was far enough. Another return would have been a quieter liquorice and a weaker plant. We stopped.
How we watch it
Germ-test the batch. Run soil and coco. If the second run is weaker than the first, we do not pack it as an improvement. Recessive problems show up once the heterozygosity drops — males in a regular pack are how you see that in the library, which is one more reason we do not feminize.
A small batch is also a brake. We cannot hide a depressed line in a warehouse of ten thousand packs. Souvenir seed. 18+.
Seeds are sold as souvenirs and for genetic preservation. 18+. Cultivation of cannabis is illegal in the UK without a Home Office licence. These notes are not a grow guide.
