In the picture below, I have separated my trees with 2 horizontal spaces and 1 vertical space from the next tree. They are all non-native trees and were planted on the same day. (The holes are for spatial reference and were not there while the trees were left for one night)
Why did the trees in the middle region not grow? The trees on the edges advanced to the next growth stage while those in the middle of the plantation pattern did not. Is there a probability where they fail to advance? Or is there a maximum number of plants that will advance to the next stage in a day? (Because I did plant a whole lot of trees and maybe I exceeded some maximum number?)