Hey there, here's some stuff you can do to promote more growth. First take your temperature down and humidity up. If you can you can raise your lights a bit so the plant stretches more. If you want bigger plants, you need bigger pots, but transplanting at this stage is probably a bad idea ! do it next time, for bigger growth. You can also increase the light schedule, but make sure you add cal mag. once you're in flower add a booster with mag sulfur, to get bigger flowers. It's pretty normal the plants are short right now, hopefully they will get huge with the flower stretch. good luck ! 🚀