With 2 of them at 3 weeks old I used metal S-Hooks and fishing line to train the main stalk horizontally to let other shoots catch up. One plant I left completely alone and it is still short and bushy with super tight nodes and huge thik stalks and stems. I also FIM'd one and now have 6 main shoots coming from the FIM'd area. I'm growing in a 1000 sq ft basement but as you can see I have made some make shift white walls for light containment. I also have NL pure, afghani and bogglegum going and K2 is by far the shortest stockiest compact plant in my garden. The k2 is fairly low odor although there are times I can smell them in the house.
Out of the 4 K2 I have left inside they do have differant pheno's. 3 of the 4 are much more potent smelling than the other. And 2 have distinctly differant leave structure and appearance. Out of 10 seeds 6 showed female at 3 weeks veg. The plant I didnt train or fim or top is about 16 inches with 30+ nodes that are super tight and compact. I really dig this plant big time!!