Stretch problem or strains?

autos go to flower after 3 weeks - when flowering a plants is not growing that many fan leafes anymore. dont worry about this, my last dark devil did not have more than 10 fan leafes

Honestly i wouldnt bother transplanting. if you were in a fabric pot I'd say go for it and cut it off but you are in a hard pot. its not going to be worth it and ay ruin the plant

In general, I think photoperiods are better because you can decide how long to veg. I think you didn't get more veg growth on this plant because of your container size. Once autofowers hit the side of the container, they are like "shit, I better start flowering now, or else I may not have any offspring" Also that's not a terrible plant, and for the size of your tent, you should get a decent yield and the quality should be really good if you keep up the good work. People say not to transplant autos, but it is already flowering. If you are careful you could pot it up to something maybe double the size and increase your yield that way beings you can't veg it anymore. If you had a bigger pot to start with I think you may have been able to veg your plant a little longer. Everything Kenn0rphan is saying is good information as well.

Hello! An auto is going to auto-transition into flower. Which it appears your plant has already done and is actually in flower rather than veg. So there are two observations I can share with you from your diary. 1. During the initial flowering stage, plants will 'stretch' and gain significant height. This stretch is dependent on your environment and genetics. Some genetics will certainly stretch more than others. 2. 100W at the lamp to plant distances is a bit weak. This will encourage your plant to gain more vertical height in order to reach the light level desired. This can be mitigated by carefully controlling the lamp to plant distance to achieve some target PPFD. That target PPFD could be different from strain to strain and can be chosen to help limit height in the future