Bubble Kush - 20L pots

Unlikely, just 2 different phenotypes. When harvesting seeds for commercial purposes, perhaps 100s of mother plants/seed plants are used to make the amount of seeds required for worldwide distribution and for enough to last for at least a 12 months supply. With each seed being an unique, individual, organic being, many variations exist. It is possible that for each packet of 5 seeds, to have 5 different plant phenotypes emerge. Even with seeds that all come from the same flower, there will be differences, so when you have seeds from 100s of flowers, differences are a part of reality. While it would be nice to have every seed grow the same, it will never happen and this is part of growing that makes it so exciting, the never ending hunt for that one in a million super plant, or pheno hunting as it is also known. So, while this strain is 80% Indica, you seem to have a taller, thinner Sativa phenotype and a more typical Indica phenotype with its smaller and more dense structure. While they may have the same parents, small genetic variations have caused both these plants to inherit slightly different dominant genes, which has led to these two plants being vastly different in appearance and growth patterns. Hope this helps, Organoman.

20 litre pots for autos is just about ideal, but at six weeks they should be already in flower if they are true autos. Delayed flowering is a genetic issue, not an issue related to pot size. Really isn't much you can do, other than continue your current care routine and patiently wait for them to flower. Problems like this is why I prefer normal photoperiod plants with their well sorted and well stabilized genetics. There seem to be too many variable and unstable autos on the market, perhaps the breeders are too keen to get "product" on the market and do not spend enough time fully developing and stabilizing their auto lines.

Based on that stage you have about three more weeks to go on flower— I would personally go about 4 so start the flush in 3 weeks. Google flushing cannabis—- some say it’s a myth. I personally do it for only three days more for the medium and less for the plant. Good luck ✌️🏻💚🌿💨