dark green leaves

I was just having fun the other day, when i chopped down one of my Ayahuascas. Thought about using it for an avatar. I probably will, I just wanted to share is larger so people can see what it actually is. Avatars are so small.

Hello Community, my plants are in their 7th week and I assume that they could have a nutrient burn. Some tips of their leaves turned brown and the color of the plants in overall is really dark green. As they might be at the beginning of their flower-state, I´m really afraid of them beeing...