Is the tallest one shown its sex yet? Just curious. Im pretty new to seeds and it seems like the males are almost always the fastest growing so Im curious if you found that at all.

PS. Your leaves curling down...whats the temp like? any airflow? if the heat isnt bad and you have airflow, then they are rootbound. My plants always cup and turn down the tips of their leaves when they are bound.

Instead of transplanting, just cut the bottom off the pot and put it into another larger pot. The roots will grow right into the large pot and the growth/bud production will really speed up.