On day 42, one of the plants had symptoms of underwatering. I took 2 days to discovery it. At first, I thought it was wind burn. At second, I tought it was overwatering. Just after analyzing better, I discovered that was underwatering.
For now, I will start to give a bigger amount of water to them, until it starts to drop under the container.
The plant that was underwatered also started to show some white pistils. Yeah! She is a girl! =)
Next week, I will change the lighting schedule and the nutrients of both plants. The other one didn't show her sex yet. But I'm confident that she is a girl!