3x Plant Outdoor near Equator only Water

It was time to remove 2 Plants, 1 because she was a Male and the other one because of no more Growth and I just wanted to finish with 3 anyways. I had left 1 Sativa Landrace from Latinoamerica and 2x Indica/Hybrid Bagseeds. In my Eyes all is looking really good, I am still just using Rain Water and no Nutrients. The only 2 "deficiencies" I could mention would be the small growth,mainly because of the just 13-14Hrs of light daily since they were Seeds but that is also part of my experiment and the purple sticks of the Sativa Landrace which in my opinion in this case in no Nutrient deficiency much more a part of the Genetic because all of the Plants I have seen of these have the same. Please tell me if am wrong and it is just a strain which needs a lot more of the Nutrient which brings up that deficiency .. I forgot the name, I am really sorry Guys 😅🙏